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📁 ..
📄 Sine-1000Hz-300ms.aif(60.25 KB)
📄 __init__.py(47 B)
📄 __main__.py(41 B)
📁 __pycache__
📄 _test_multiprocessing.py(183.09 KB)
📄 allsans.pem(9.87 KB)
📄 ann_module.py(1.08 KB)
📄 ann_module2.py(519 B)
📄 ann_module3.py(448 B)
📁 audiodata
📄 audiotest.au(27.48 KB)
📄 audiotests.py(12.46 KB)
📄 audit-tests.py(8.9 KB)
📄 autotest.py(209 B)
📄 bad_coding.py(24 B)
📄 bad_coding2.py(30 B)
📄 bad_getattr.py(61 B)
📄 bad_getattr2.py(77 B)
📄 bad_getattr3.py(139 B)
📄 badcert.pem(1.88 KB)
📄 badkey.pem(2.11 KB)
📄 badsyntax_3131.py(32 B)
📄 badsyntax_future10.py(95 B)
📄 badsyntax_future3.py(172 B)
📄 badsyntax_future4.py(153 B)
📄 badsyntax_future5.py(184 B)
📄 badsyntax_future6.py(161 B)
📄 badsyntax_future7.py(196 B)
📄 badsyntax_future8.py(122 B)
📄 badsyntax_future9.py(142 B)
📄 badsyntax_pep3120.py(14 B)
📄 bisect_cmd.py(4.85 KB)
📄 bytecode_helper.py(1.56 KB)
📁 capath
📄 cfgparser.1(67 B)
📄 cfgparser.2(19.02 KB)
📄 cfgparser.3(1.55 KB)
📁 cjkencodings
📄 clinic.test(94.65 KB)
📄 cmath_testcases.txt(141.05 KB)
📄 coding20731.py(22 B)
📄 curses_tests.py(1.22 KB)
📁 data
📄 dataclass_module_1.py(837 B)
📄 dataclass_module_1_str.py(835 B)
📄 dataclass_module_2.py(756 B)
📄 dataclass_module_2_str.py(754 B)
📄 dataclass_textanno.py(126 B)
📄 datetimetester.py(239.84 KB)
📁 decimaltestdata
📄 dis_module.py(76 B)
📄 doctest_aliases.py(240 B)
📄 double_const.py(1.18 KB)
📁 dtracedata
📁 eintrdata
📄 empty.vbs(70 B)
📁 encoded_modules
📄 exception_hierarchy.txt(1.78 KB)
📄 ffdh3072.pem(2.16 KB)
📄 final_a.py(411 B)
📄 final_b.py(411 B)
📄 floating_points.txt(15.92 KB)
📄 fork_wait.py(2.53 KB)
📄 formatfloat_testcases.txt(7.45 KB)
📄 future_test1.py(229 B)
📄 future_test2.py(149 B)
📄 gdb_sample.py(153 B)
📄 good_getattr.py(198 B)
📄 idnsans.pem(9.71 KB)
📄 ieee754.txt(3.21 KB)
📁 imghdrdata
📄 imp_dummy.py(63 B)
📄 inspect_fodder.py(1.88 KB)
📄 inspect_fodder2.py(2.06 KB)
📄 keycert.passwd.pem(4.13 KB)
📄 keycert.pem(3.96 KB)
📄 keycert2.pem(3.98 KB)
📄 keycert3.pem(9.23 KB)
📄 keycert4.pem(9.24 KB)
📄 keycertecc.pem(5.5 KB)
📁 libregrtest
📄 list_tests.py(16.54 KB)
📄 lock_tests.py(28.26 KB)
📄 mailcap.txt(1.24 KB)
📄 make_ssl_certs.py(9.25 KB)
📄 mapping_tests.py(21.75 KB)
📄 math_testcases.txt(23.19 KB)
📄 memory_watchdog.py(859 B)
📄 mime.types(47.37 KB)
📄 mock_socket.py(3.53 KB)
📄 mod_generics_cache.py(1.13 KB)
📄 mp_fork_bomb.py(448 B)
📄 mp_preload.py(351 B)
📄 multibytecodec_support.py(14.17 KB)
📄 nokia.pem(1.88 KB)
📄 nosan.pem(7.54 KB)
📄 nullbytecert.pem(5.31 KB)
📄 nullcert.pem(0 B)
📄 outstanding_bugs.py(370 B)
📄 pickletester.py(135.99 KB)
📄 profilee.py(2.97 KB)
📄 pstats.pck(65.05 KB)
📄 pycacert.pem(5.53 KB)
📄 pycakey.pem(2.43 KB)
📄 pyclbr_input.py(648 B)
📄 pydoc_mod.py(713 B)
📄 pydocfodder.py(6.18 KB)
📄 pythoninfo.py(20.34 KB)
📄 randv2_32.pck(7.34 KB)
📄 randv2_64.pck(7.19 KB)
📄 randv3.pck(7.82 KB)
📄 re_tests.py(25.93 KB)
📄 recursion.tar(516 B)
📄 regrtest.py(1.34 KB)
📄 relimport.py(27 B)
📄 reperf.py(538 B)
📄 revocation.crl(800 B)
📄 sample_doctest.py(1.02 KB)
📄 sample_doctest_no_docstrings.py(227 B)
📄 sample_doctest_no_doctests.py(269 B)
📄 secp384r1.pem(256 B)
📄 selfsigned_pythontestdotnet.pem(2.08 KB)
📄 seq_tests.py(14.18 KB)
📄 sgml_input.html(8.1 KB)
📄 signalinterproctester.py(2.7 KB)
📁 sndhdrdata
📄 sortperf.py(4.69 KB)
📄 ssl_cert.pem(1.53 KB)
📄 ssl_key.passwd.pem(2.59 KB)
📄 ssl_key.pem(2.43 KB)
📄 ssl_servers.py(7.04 KB)
📄 ssltests.py(1.03 KB)
📄 string_tests.py(64.65 KB)
📁 subprocessdata
📁 support
📄 talos-2019-0758.pem(1.3 KB)
📄 test___all__.py(4.12 KB)
📄 test___future__.py(2.36 KB)
📄 test__locale.py(7.83 KB)
📄 test__opcode.py(3.03 KB)
📄 test__osx_support.py(13.66 KB)
📄 test__xxsubinterpreters.py(68.7 KB)
📄 test_abc.py(18 KB)
📄 test_abstract_numbers.py(1.49 KB)
📄 test_aifc.py(17.68 KB)
📄 test_argparse.py(172.67 KB)
📄 test_array.py(52.57 KB)
📄 test_asdl_parser.py(4.15 KB)
📄 test_ast.py(88.53 KB)
📄 test_asyncgen.py(31.44 KB)
📄 test_asynchat.py(9.28 KB)
📁 test_asyncio
📄 test_asyncore.py(25.81 KB)
📄 test_atexit.py(5.81 KB)
📄 test_audioop.py(28.24 KB)
📄 test_audit.py(4.05 KB)
📄 test_augassign.py(7.68 KB)
📄 test_base64.py(30.17 KB)
📄 test_baseexception.py(6.86 KB)
📄 test_bdb.py(41.55 KB)
📄 test_bigaddrspace.py(2.92 KB)
📄 test_bigmem.py(44.88 KB)
📄 test_binascii.py(18 KB)
📄 test_binhex.py(1.79 KB)
📄 test_binop.py(14.14 KB)
📄 test_bisect.py(13.63 KB)
📄 test_bool.py(12.48 KB)
📄 test_buffer.py(160.04 KB)
📄 test_bufio.py(2.54 KB)
📄 test_builtin.py(78.38 KB)
📄 test_bytes.py(72.23 KB)
📄 test_bz2.py(36.76 KB)
📄 test_c_locale_coercion.py(18.82 KB)
📄 test_calendar.py(48.71 KB)
📄 test_call.py(20.88 KB)
📄 test_capi.py(30.46 KB)
📄 test_cgi.py(22.15 KB)
📄 test_cgitb.py(2.5 KB)
📄 test_charmapcodec.py(1.68 KB)
📄 test_class.py(17.42 KB)
📄 test_clinic.py(21.71 KB)
📄 test_cmath.py(24.07 KB)
📄 test_cmd.py(6.1 KB)
📄 test_cmd_line.py(33.72 KB)
📄 test_cmd_line_script.py(31.46 KB)
📄 test_code.py(13.66 KB)
📄 test_code_module.py(5.51 KB)
📄 test_codeccallbacks.py(40.97 KB)
📄 test_codecencodings_cn.py(3.86 KB)
📄 test_codecencodings_hk.py(701 B)
📄 test_codecencodings_iso2022.py(1.36 KB)
📄 test_codecencodings_jp.py(4.79 KB)
📄 test_codecencodings_kr.py(2.96 KB)
📄 test_codecencodings_tw.py(681 B)
📄 test_codecmaps_cn.py(746 B)
📄 test_codecmaps_hk.py(386 B)
📄 test_codecmaps_jp.py(1.7 KB)
📄 test_codecmaps_kr.py(1.16 KB)
📄 test_codecmaps_tw.py(705 B)
📄 test_codecs.py(129.38 KB)
📄 test_codeop.py(7.97 KB)
📄 test_collections.py(83.93 KB)
📄 test_colorsys.py(3.83 KB)
📄 test_compare.py(3.82 KB)
📄 test_compile.py(36.48 KB)
📄 test_compileall.py(26.7 KB)
📄 test_complex.py(30.24 KB)
📄 test_concurrent_futures.py(44.93 KB)
📄 test_configparser.py(84.93 KB)
📄 test_contains.py(3.49 KB)
📄 test_context.py(29.33 KB)
📄 test_contextlib.py(32.54 KB)
📄 test_contextlib_async.py(14.82 KB)
📄 test_copy.py(25.81 KB)
📄 test_copyreg.py(4.39 KB)
📄 test_coroutines.py(62.52 KB)
📄 test_cprofile.py(6.33 KB)
📄 test_crashers.py(1.17 KB)
📄 test_crypt.py(3.97 KB)
📄 test_csv.py(47.77 KB)
📄 test_ctypes.py(184 B)
📄 test_curses.py(45.47 KB)
📄 test_dataclasses.py(108.8 KB)
📄 test_datetime.py(2.15 KB)
📄 test_dbm.py(6.45 KB)
📄 test_dbm_dumb.py(10.61 KB)
📄 test_dbm_gnu.py(6.22 KB)
📄 test_dbm_ndbm.py(5.05 KB)
📄 test_decimal.py(206.63 KB)
📄 test_decorators.py(9.48 KB)
📄 test_defaultdict.py(5.88 KB)
📄 test_deque.py(34.46 KB)
📄 test_descr.py(190.58 KB)
📄 test_descrtut.py(11.53 KB)
📄 test_devpoll.py(4.5 KB)
📄 test_dict.py(45 KB)
📄 test_dict_version.py(5.88 KB)
📄 test_dictcomps.py(4.42 KB)
📄 test_dictviews.py(11.68 KB)
📄 test_difflib.py(19.64 KB)
📄 test_difflib_expect.html(100.85 KB)
📄 test_dis.py(48.4 KB)
📄 test_distutils.py(375 B)
📄 test_doctest.py(98.67 KB)
📄 test_doctest.txt(300 B)
📄 test_doctest2.py(2.3 KB)
📄 test_doctest2.txt(392 B)
📄 test_doctest3.txt(82 B)
📄 test_doctest4.txt(244 B)
📄 test_docxmlrpc.py(8.67 KB)
📄 test_dtrace.py(5.23 KB)
📄 test_dummy_thread.py(9.69 KB)
📄 test_dummy_threading.py(1.7 KB)
📄 test_dynamic.py(4.29 KB)
📄 test_dynamicclassattribute.py(9.57 KB)
📄 test_eintr.py(1.32 KB)
📁 test_email
📄 test_embed.py(49.23 KB)
📄 test_ensurepip.py(9.83 KB)
📄 test_enum.py(113.68 KB)
📄 test_enumerate.py(8.46 KB)
📄 test_eof.py(1.94 KB)
📄 test_epoll.py(9.03 KB)
📄 test_errno.py(1.04 KB)
📄 test_exception_hierarchy.py(7.43 KB)
📄 test_exception_variations.py(3.86 KB)
📄 test_exceptions.py(49.81 KB)
📄 test_extcall.py(13.49 KB)
📄 test_faulthandler.py(28.13 KB)
📄 test_fcntl.py(6.21 KB)
📄 test_file.py(11.02 KB)
📄 test_file_eintr.py(10.6 KB)
📄 test_filecmp.py(8.69 KB)
📄 test_fileinput.py(37.33 KB)
📄 test_fileio.py(19.96 KB)
📄 test_finalization.py(14.66 KB)
📄 test_float.py(63.41 KB)
📄 test_flufl.py(1.32 KB)
📄 test_fnmatch.py(5.07 KB)
📄 test_fork1.py(3.67 KB)
📄 test_format.py(22.58 KB)
📄 test_fractions.py(29.83 KB)
📄 test_frame.py(5.67 KB)
📄 test_frozen.py(943 B)
📄 test_fstring.py(46.16 KB)
📄 test_ftplib.py(39.71 KB)
📄 test_funcattrs.py(13.54 KB)
📄 test_functools.py(90.59 KB)
📄 test_future.py(11.9 KB)
📄 test_future3.py(490 B)
📄 test_future4.py(222 B)
📄 test_future5.py(510 B)
📄 test_gc.py(40.49 KB)
📄 test_gdb.py(40.88 KB)
📄 test_generator_stop.py(943 B)
📄 test_generators.py(58.51 KB)
📄 test_genericclass.py(9.28 KB)
📄 test_genericpath.py(21.7 KB)
📄 test_genexps.py(7.12 KB)
📄 test_getargs2.py(50 KB)
📄 test_getopt.py(6.75 KB)
📄 test_getpass.py(6.29 KB)
📄 test_gettext.py(41.38 KB)
📄 test_glob.py(13.03 KB)
📄 test_global.py(1.31 KB)
📄 test_grammar.py(57.5 KB)
📄 test_grp.py(3.54 KB)
📄 test_gzip.py(29.9 KB)
📄 test_hash.py(11.45 KB)
📄 test_hashlib.py(39.43 KB)
📄 test_heapq.py(16.4 KB)
📄 test_hmac.py(22.24 KB)
📄 test_html.py(4.23 KB)
📄 test_htmlparser.py(33.19 KB)
📄 test_http_cookiejar.py(78.36 KB)
📄 test_http_cookies.py(18.71 KB)
📄 test_httplib.py(76.98 KB)
📄 test_httpservers.py(45.24 KB)
📄 test_idle.py(825 B)
📄 test_imaplib.py(38.95 KB)
📄 test_imghdr.py(4.66 KB)
📄 test_imp.py(17.73 KB)
📁 test_import
📁 test_importlib
📄 test_index.py(8.37 KB)
📄 test_inspect.py(151.79 KB)
📄 test_int.py(20.8 KB)
📄 test_int_literal.py(6.89 KB)
📄 test_io.py(163.94 KB)
📄 test_ioctl.py(3.2 KB)
📄 test_ipaddress.py(90.98 KB)
📄 test_isinstance.py(10.25 KB)
📄 test_iter.py(31.81 KB)
📄 test_iterlen.py(7.1 KB)
📄 test_itertools.py(101.41 KB)
📁 test_json
📄 test_keyword.py(1.23 KB)
📄 test_keywordonlyarg.py(6.85 KB)
📄 test_kqueue.py(8.76 KB)
📄 test_largefile.py(6.83 KB)
📄 test_lib2to3.py(101 B)
📄 test_linecache.py(7.79 KB)
📄 test_list.py(7.4 KB)
📄 test_listcomps.py(3.76 KB)
📄 test_lltrace.py(1012 B)
📄 test_locale.py(23.87 KB)
📄 test_logging.py(182.43 KB)
📄 test_long.py(53.21 KB)
📄 test_longexp.py(233 B)
📄 test_lzma.py(87.92 KB)
📄 test_mailbox.py(91.92 KB)
📄 test_mailcap.py(9.88 KB)
📄 test_marshal.py(20.57 KB)
📄 test_math.py(82.18 KB)
📄 test_memoryio.py(31.48 KB)
📄 test_memoryview.py(17.78 KB)
📄 test_metaclass.py(6.2 KB)
📄 test_mimetypes.py(12.14 KB)
📄 test_minidom.py(66.95 KB)
📄 test_mmap.py(29.04 KB)
📄 test_module.py(10.3 KB)
📄 test_modulefinder.py(12.2 KB)
📄 test_msilib.py(5.06 KB)
📄 test_multibytecodec.py(15.04 KB)
📄 test_multiprocessing_fork.py(477 B)
📄 test_multiprocessing_forkserver.py(392 B)
📄 test_multiprocessing_main_handling.py(11.45 KB)
📄 test_multiprocessing_spawn.py(277 B)
📄 test_named_expressions.py(16.51 KB)
📄 test_netrc.py(5.96 KB)
📄 test_nis.py(1.13 KB)
📄 test_nntplib.py(61.7 KB)
📄 test_normalization.py(3.66 KB)
📄 test_ntpath.py(35.08 KB)
📄 test_numeric_tower.py(7.18 KB)
📄 test_opcodes.py(3.61 KB)
📄 test_openpty.py(600 B)
📄 test_operator.py(23.54 KB)
📄 test_optparse.py(60.99 KB)
📄 test_ordered_dict.py(30.22 KB)
📄 test_os.py(150.53 KB)
📄 test_ossaudiodev.py(7.06 KB)
📄 test_osx_env.py(1.3 KB)
📄 test_parser.py(35.72 KB)
📄 test_pathlib.py(97.12 KB)
📄 test_pdb.py(55.36 KB)
📄 test_peepholer.py(19.41 KB)
📄 test_pickle.py(19.16 KB)
📄 test_picklebuffer.py(4.96 KB)
📄 test_pickletools.py(4.33 KB)
📄 test_pipes.py(6.59 KB)
📄 test_pkg.py(9.59 KB)
📄 test_pkgimport.py(2.67 KB)
📄 test_pkgutil.py(19.25 KB)
📄 test_platform.py(14.31 KB)
📄 test_plistlib.py(41.43 KB)
📄 test_poll.py(7.23 KB)
📄 test_popen.py(1.98 KB)
📄 test_poplib.py(16.97 KB)
📄 test_positional_only_arg.py(17.5 KB)
📄 test_posix.py(75.76 KB)
📄 test_posixpath.py(29.19 KB)
📄 test_pow.py(5.44 KB)
📄 test_pprint.py(43.85 KB)
📄 test_print.py(7.37 KB)
📄 test_profile.py(8.72 KB)
📄 test_property.py(8.77 KB)
📄 test_pstats.py(3.04 KB)
📄 test_pty.py(11.97 KB)
📄 test_pulldom.py(12.66 KB)
📄 test_pwd.py(4.17 KB)
📄 test_py_compile.py(10.78 KB)
📄 test_pyclbr.py(10 KB)
📄 test_pydoc.py(56.98 KB)
📄 test_pyexpat.py(26.54 KB)
📄 test_queue.py(20.36 KB)
📄 test_quopri.py(7.78 KB)
📄 test_raise.py(12.86 KB)
📄 test_random.py(45.59 KB)
📄 test_range.py(23.35 KB)
📄 test_re.py(106.41 KB)
📄 test_readline.py(12.95 KB)
📄 test_regrtest.py(46.36 KB)
📄 test_repl.py(3.96 KB)
📄 test_reprlib.py(15.12 KB)
📄 test_resource.py(7.02 KB)
📄 test_richcmp.py(11.91 KB)
📄 test_rlcompleter.py(6.3 KB)
📄 test_robotparser.py(10.69 KB)
📄 test_runpy.py(33.86 KB)
📄 test_sax.py(46.9 KB)
📄 test_sched.py(6.41 KB)
📄 test_scope.py(19.7 KB)
📄 test_script_helper.py(5.78 KB)
📄 test_secrets.py(4.28 KB)
📄 test_select.py(2.69 KB)
📄 test_selectors.py(17.79 KB)
📄 test_set.py(64.41 KB)
📄 test_setcomps.py(3.7 KB)
📄 test_shelve.py(6.24 KB)
📄 test_shlex.py(13.29 KB)
📄 test_shutil.py(101.55 KB)
📄 test_signal.py(46.62 KB)
📄 test_site.py(24.71 KB)
📄 test_slice.py(8.25 KB)
📄 test_smtpd.py(40.14 KB)
📄 test_smtplib.py(56.51 KB)
📄 test_smtpnet.py(2.87 KB)
📄 test_sndhdr.py(1.43 KB)
📄 test_socket.py(232.71 KB)
📄 test_socketserver.py(17.7 KB)
📄 test_sort.py(13.42 KB)
📄 test_source_encoding.py(7.89 KB)
📄 test_spwd.py(2.71 KB)
📄 test_sqlite.py(948 B)
📄 test_ssl.py(203.3 KB)
📄 test_startfile.py(1.29 KB)
📄 test_stat.py(8.3 KB)
📄 test_statistics.py(106.5 KB)
📄 test_strftime.py(7.54 KB)
📄 test_string.py(19.8 KB)
📄 test_string_literals.py(9.88 KB)
📄 test_stringprep.py(3.04 KB)
📄 test_strptime.py(34.42 KB)
📄 test_strtod.py(20.06 KB)
📄 test_struct.py(34.41 KB)
📄 test_structmembers.py(4.7 KB)
📄 test_structseq.py(3.87 KB)
📄 test_subclassinit.py(8.12 KB)
📄 test_subprocess.py(142.64 KB)
📄 test_sunau.py(6.07 KB)
📄 test_sundry.py(2.07 KB)
📄 test_super.py(9.6 KB)
📄 test_support.py(24.12 KB)
📄 test_symbol.py(2.06 KB)
📄 test_symtable.py(9.13 KB)
📄 test_syntax.py(25.75 KB)
📄 test_sys.py(55.24 KB)
📄 test_sys_setprofile.py(12.31 KB)
📄 test_sys_settrace.py(43.08 KB)
📄 test_sysconfig.py(17.01 KB)
📄 test_syslog.py(1.15 KB)
📄 test_tabnanny.py(13.44 KB)
📄 test_tarfile.py(98.31 KB)
📄 test_tcl.py(30.74 KB)
📄 test_telnetlib.py(12.7 KB)
📄 test_tempfile.py(52.57 KB)
📄 test_textwrap.py(38.84 KB)
📄 test_thread.py(8.41 KB)
📄 test_threaded_import.py(8.9 KB)
📄 test_threadedtempfile.py(1.85 KB)
📄 test_threading.py(47.52 KB)
📄 test_threading_local.py(6.09 KB)
📄 test_threadsignals.py(10.09 KB)
📄 test_time.py(38.43 KB)
📄 test_timeit.py(14.8 KB)
📄 test_timeout.py(11.19 KB)
📄 test_tix.py(756 B)
📄 test_tk.py(362 B)
📄 test_tokenize.py(63.18 KB)
📁 test_tools
📄 test_trace.py(19.89 KB)
📄 test_traceback.py(46.97 KB)
📄 test_tracemalloc.py(37.41 KB)
📄 test_ttk_guionly.py(746 B)
📄 test_ttk_textonly.py(299 B)
📄 test_tuple.py(18.85 KB)
📄 test_turtle.py(12.79 KB)
📄 test_type_comments.py(10.13 KB)
📄 test_typechecks.py(2.55 KB)
📄 test_types.py(58 KB)
📄 test_typing.py(122.05 KB)
📄 test_ucn.py(9.35 KB)
📄 test_unary.py(1.63 KB)
📄 test_unicode.py(129.94 KB)
📄 test_unicode_file.py(5.74 KB)
📄 test_unicode_file_functions.py(6.84 KB)
📄 test_unicode_identifiers.py(891 B)
📄 test_unicodedata.py(12.7 KB)
📄 test_unittest.py(286 B)
📄 test_univnewlines.py(3.83 KB)
📄 test_unpack.py(3.01 KB)
📄 test_unpack_ex.py(8.73 KB)
📄 test_urllib.py(71.24 KB)
📄 test_urllib2.py(76.95 KB)
📄 test_urllib2_localnet.py(24.24 KB)
📄 test_urllib2net.py(12.39 KB)
📄 test_urllib_response.py(1.69 KB)
📄 test_urllibnet.py(8.9 KB)
📄 test_urlparse.py(64.87 KB)
📄 test_userdict.py(7.64 KB)
📄 test_userlist.py(1.97 KB)
📄 test_userstring.py(2.4 KB)
📄 test_utf8_mode.py(9.22 KB)
📄 test_utf8source.py(1.15 KB)
📄 test_uu.py(8.02 KB)
📄 test_uuid.py(35.74 KB)
📄 test_venv.py(20.46 KB)
📄 test_wait3.py(1.16 KB)
📄 test_wait4.py(1.15 KB)
📁 test_warnings
📄 test_wave.py(6.57 KB)
📄 test_weakref.py(69.47 KB)
📄 test_weakset.py(15.03 KB)
📄 test_webbrowser.py(10.47 KB)
📄 test_winconsoleio.py(6.14 KB)
📄 test_winreg.py(21.38 KB)
📄 test_winsound.py(4.57 KB)
📄 test_with.py(25.78 KB)
📄 test_wsgiref.py(30.1 KB)
📄 test_xdrlib.py(2.17 KB)
📄 test_xml_dom_minicompat.py(4.18 KB)
📄 test_xml_etree.py(147.87 KB)
📄 test_xml_etree_c.py(8.06 KB)
📄 test_xmlrpc.py(55.96 KB)
📄 test_xmlrpc_net.py(1015 B)
📄 test_xxtestfuzz.py(670 B)
📄 test_yield_from.py(30.01 KB)
📄 test_zipapp.py(15.92 KB)
📄 test_zipfile.py(115.45 KB)
📄 test_zipfile64.py(5.8 KB)
📄 test_zipimport.py(29.28 KB)
📄 test_zipimport_support.py(10.44 KB)
📄 test_zlib.py(34.48 KB)
📄 testcodec.py(1.02 KB)
📄 testtar.tar(425 KB)
📄 tf_inherit_check.py(714 B)
📄 threaded_import_hangers.py(1.45 KB)
📄 time_hashlib.py(2.87 KB)
📄 tokenize_tests-latin1-coding-cookie-and-utf8-bom-sig.txt(443 B)
📄 tokenize_tests-no-coding-cookie-and-utf8-bom-sig-only.txt(302 B)
📄 tokenize_tests-utf8-coding-cookie-and-no-utf8-bom-sig.txt(421 B)
📄 tokenize_tests-utf8-coding-cookie-and-utf8-bom-sig.txt(326 B)
📄 tokenize_tests.txt(2.65 KB)
📁 tracedmodules
📄 win_console_handler.py(1.38 KB)
📁 xmltestdata
📄 xmltests.py(499 B)
📄 zip_cp437_header.zip(270 B)
📄 zipdir.zip(374 B)
📁 ziptestdata

Editing: test_gc.py

import unittest
from test.support import (verbose, refcount_test, run_unittest,
                          strip_python_stderr, cpython_only, start_threads,
                          temp_dir, requires_type_collecting, TESTFN, unlink,
                          import_module)
from test.support.script_helper import assert_python_ok, make_script

import gc
import sys
import sysconfig
import textwrap
import threading
import time
import weakref

try:
    from _testcapi import with_tp_del
except ImportError:
    def with_tp_del(cls):
        class C(object):
            def __new__(cls, *args, **kwargs):
                raise TypeError('requires _testcapi.with_tp_del')
        return C

### Support code
###############################################################################

# Bug 1055820 has several tests of longstanding bugs involving weakrefs and
# cyclic gc.

# An instance of C1055820 has a self-loop, so becomes cyclic trash when
# unreachable.
class C1055820(object):
    def __init__(self, i):
        self.i = i
        self.loop = self

class GC_Detector(object):
    # Create an instance I.  Then gc hasn't happened again so long as
    # I.gc_happened is false.

def __init__(self):
        self.gc_happened = False

def it_happened(ignored):
            self.gc_happened = True

# Create a piece of cyclic trash that triggers it_happened when
        # gc collects it.
        self.wr = weakref.ref(C1055820(666), it_happened)

@with_tp_del
class Uncollectable(object):
    """Create a reference cycle with multiple __del__ methods.

An object in a reference cycle will never have zero references,
    and so must be garbage collected.  If one or more objects in the
    cycle have __del__ methods, the gc refuses to guess an order,
    and leaves the cycle uncollected."""
    def __init__(self, partner=None):
        if partner is None:
            self.partner = Uncollectable(partner=self)
        else:
            self.partner = partner
    def __tp_del__(self):
        pass

if sysconfig.get_config_vars().get('PY_CFLAGS', ''):
    BUILD_WITH_NDEBUG = ('-DNDEBUG' in sysconfig.get_config_vars()['PY_CFLAGS'])
else:
    # Usually, sys.gettotalrefcount() is only present if Python has been
    # compiled in debug mode. If it's missing, expect that Python has
    # been released in release mode: with NDEBUG defined.
    BUILD_WITH_NDEBUG = (not hasattr(sys, 'gettotalrefcount'))

### Tests
###############################################################################

class GCTests(unittest.TestCase):
    def test_list(self):
        l = []
        l.append(l)
        gc.collect()
        del l
        self.assertEqual(gc.collect(), 1)

def test_dict(self):
        d = {}
        d[1] = d
        gc.collect()
        del d
        self.assertEqual(gc.collect(), 1)

def test_tuple(self):
        # since tuples are immutable we close the loop with a list
        l = []
        t = (l,)
        l.append(t)
        gc.collect()
        del t
        del l
        self.assertEqual(gc.collect(), 2)

def test_class(self):
        class A:
            pass
        A.a = A
        gc.collect()
        del A
        self.assertNotEqual(gc.collect(), 0)

def test_newstyleclass(self):
        class A(object):
            pass
        gc.collect()
        del A
        self.assertNotEqual(gc.collect(), 0)

def test_instance(self):
        class A:
            pass
        a = A()
        a.a = a
        gc.collect()
        del a
        self.assertNotEqual(gc.collect(), 0)

@requires_type_collecting
    def test_newinstance(self):
        class A(object):
            pass
        a = A()
        a.a = a
        gc.collect()
        del a
        self.assertNotEqual(gc.collect(), 0)
        class B(list):
            pass
        class C(B, A):
            pass
        a = C()
        a.a = a
        gc.collect()
        del a
        self.assertNotEqual(gc.collect(), 0)
        del B, C
        self.assertNotEqual(gc.collect(), 0)
        A.a = A()
        del A
        self.assertNotEqual(gc.collect(), 0)
        self.assertEqual(gc.collect(), 0)

def test_method(self):
        # Tricky: self.__init__ is a bound method, it references the instance.
        class A:
            def __init__(self):
                self.init = self.__init__
        a = A()
        gc.collect()
        del a
        self.assertNotEqual(gc.collect(), 0)

@cpython_only
    def test_legacy_finalizer(self):
        # A() is uncollectable if it is part of a cycle, make sure it shows up
        # in gc.garbage.
        @with_tp_del
        class A:
            def __tp_del__(self): pass
        class B:
            pass
        a = A()
        a.a = a
        id_a = id(a)
        b = B()
        b.b = b
        gc.collect()
        del a
        del b
        self.assertNotEqual(gc.collect(), 0)
        for obj in gc.garbage:
            if id(obj) == id_a:
                del obj.a
                break
        else:
            self.fail("didn't find obj in garbage (finalizer)")
        gc.garbage.remove(obj)

@cpython_only
    def test_legacy_finalizer_newclass(self):
        # A() is uncollectable if it is part of a cycle, make sure it shows up
        # in gc.garbage.
        @with_tp_del
        class A(object):
            def __tp_del__(self): pass
        class B(object):
            pass
        a = A()
        a.a = a
        id_a = id(a)
        b = B()
        b.b = b
        gc.collect()
        del a
        del b
        self.assertNotEqual(gc.collect(), 0)
        for obj in gc.garbage:
            if id(obj) == id_a:
                del obj.a
                break
        else:
            self.fail("didn't find obj in garbage (finalizer)")
        gc.garbage.remove(obj)

def test_function(self):
        # Tricky: f -> d -> f, code should call d.clear() after the exec to
        # break the cycle.
        d = {}
        exec("def f(): pass\n", d)
        gc.collect()
        del d
        self.assertEqual(gc.collect(), 2)

@refcount_test
    def test_frame(self):
        def f():
            frame = sys._getframe()
        gc.collect()
        f()
        self.assertEqual(gc.collect(), 1)

def test_saveall(self):
        # Verify that cyclic garbage like lists show up in gc.garbage if the
        # SAVEALL option is enabled.

# First make sure we don't save away other stuff that just happens to
        # be waiting for collection.
        gc.collect()
        # if this fails, someone else created immortal trash
        self.assertEqual(gc.garbage, [])

L = []
        L.append(L)
        id_L = id(L)

debug = gc.get_debug()
        gc.set_debug(debug | gc.DEBUG_SAVEALL)
        del L
        gc.collect()
        gc.set_debug(debug)

self.assertEqual(len(gc.garbage), 1)
        obj = gc.garbage.pop()
        self.assertEqual(id(obj), id_L)

def test_del(self):
        # __del__ methods can trigger collection, make this to happen
        thresholds = gc.get_threshold()
        gc.enable()
        gc.set_threshold(1)

class A:
            def __del__(self):
                dir(self)
        a = A()
        del a

gc.disable()
        gc.set_threshold(*thresholds)

def test_del_newclass(self):
        # __del__ methods can trigger collection, make this to happen
        thresholds = gc.get_threshold()
        gc.enable()
        gc.set_threshold(1)

class A(object):
            def __del__(self):
                dir(self)
        a = A()
        del a

gc.disable()
        gc.set_threshold(*thresholds)

# The following two tests are fragile:
    # They precisely count the number of allocations,
    # which is highly implementation-dependent.
    # For example, disposed tuples are not freed, but reused.
    # To minimize variations, though, we first store the get_count() results
    # and check them at the end.
    @refcount_test
    def test_get_count(self):
        gc.collect()
        a, b, c = gc.get_count()
        x = []
        d, e, f = gc.get_count()
        self.assertEqual((b, c), (0, 0))
        self.assertEqual((e, f), (0, 0))
        # This is less fragile than asserting that a equals 0.
        self.assertLess(a, 5)
        # Between the two calls to get_count(), at least one object was
        # created (the list).
        self.assertGreater(d, a)

@refcount_test
    def test_collect_generations(self):
        gc.collect()
        # This object will "trickle" into generation N + 1 after
        # each call to collect(N)
        x = []
        gc.collect(0)
        # x is now in gen 1
        a, b, c = gc.get_count()
        gc.collect(1)
        # x is now in gen 2
        d, e, f = gc.get_count()
        gc.collect(2)
        # x is now in gen 3
        g, h, i = gc.get_count()
        # We don't check a, d, g since their exact values depends on
        # internal implementation details of the interpreter.
        self.assertEqual((b, c), (1, 0))
        self.assertEqual((e, f), (0, 1))
        self.assertEqual((h, i), (0, 0))

def test_trashcan(self):
        class Ouch:
            n = 0
            def __del__(self):
                Ouch.n = Ouch.n + 1
                if Ouch.n % 17 == 0:
                    gc.collect()

# "trashcan" is a hack to prevent stack overflow when deallocating
        # very deeply nested tuples etc.  It works in part by abusing the
        # type pointer and refcount fields, and that can yield horrible
        # problems when gc tries to traverse the structures.
        # If this test fails (as it does in 2.0, 2.1 and 2.2), it will
        # most likely die via segfault.

# Note:  In 2.3 the possibility for compiling without cyclic gc was
        # removed, and that in turn allows the trashcan mechanism to work
        # via much simpler means (e.g., it never abuses the type pointer or
        # refcount fields anymore).  Since it's much less likely to cause a
        # problem now, the various constants in this expensive (we force a lot
        # of full collections) test are cut back from the 2.2 version.
        gc.enable()
        N = 150
        for count in range(2):
            t = []
            for i in range(N):
                t = [t, Ouch()]
            u = []
            for i in range(N):
                u = [u, Ouch()]
            v = {}
            for i in range(N):
                v = {1: v, 2: Ouch()}
        gc.disable()

def test_trashcan_threads(self):
        # Issue #13992: trashcan mechanism should be thread-safe
        NESTING = 60
        N_THREADS = 2

def sleeper_gen():
            """A generator that releases the GIL when closed or dealloc'ed."""
            try:
                yield
            finally:
                time.sleep(0.000001)

class C(list):
            # Appending to a list is atomic, which avoids the use of a lock.
            inits = []
            dels = []
            def __init__(self, alist):
                self[:] = alist
                C.inits.append(None)
            def __del__(self):
                # This __del__ is called by subtype_dealloc().
                C.dels.append(None)
                # `g` will release the GIL when garbage-collected.  This
                # helps assert subtype_dealloc's behaviour when threads
                # switch in the middle of it.
                g = sleeper_gen()
                next(g)
                # Now that __del__ is finished, subtype_dealloc will proceed
                # to call list_dealloc, which also uses the trashcan mechanism.

def make_nested():
            """Create a sufficiently nested container object so that the
            trashcan mechanism is invoked when deallocating it."""
            x = C([])
            for i in range(NESTING):
                x = [C([x])]
            del x

def run_thread():
            """Exercise make_nested() in a loop."""
            while not exit:
                make_nested()

old_switchinterval = sys.getswitchinterval()
        sys.setswitchinterval(1e-5)
        try:
            exit = []
            threads = []
            for i in range(N_THREADS):
                t = threading.Thread(target=run_thread)
                threads.append(t)
            with start_threads(threads, lambda: exit.append(1)):
                time.sleep(1.0)
        finally:
            sys.setswitchinterval(old_switchinterval)
        gc.collect()
        self.assertEqual(len(C.inits), len(C.dels))

def test_boom(self):
        class Boom:
            def __getattr__(self, someattribute):
                del self.attr
                raise AttributeError

a = Boom()
        b = Boom()
        a.attr = b
        b.attr = a

gc.collect()
        garbagelen = len(gc.garbage)
        del a, b
        # a<->b are in a trash cycle now.  Collection will invoke
        # Boom.__getattr__ (to see whether a and b have __del__ methods), and
        # __getattr__ deletes the internal "attr" attributes as a side effect.
        # That causes the trash cycle to get reclaimed via refcounts falling to
        # 0, thus mutating the trash graph as a side effect of merely asking
        # whether __del__ exists.  This used to (before 2.3b1) crash Python.
        # Now __getattr__ isn't called.
        self.assertEqual(gc.collect(), 4)
        self.assertEqual(len(gc.garbage), garbagelen)

def test_boom2(self):
        class Boom2:
            def __init__(self):
                self.x = 0

def __getattr__(self, someattribute):
                self.x += 1
                if self.x > 1:
                    del self.attr
                raise AttributeError

a = Boom2()
        b = Boom2()
        a.attr = b
        b.attr = a

gc.collect()
        garbagelen = len(gc.garbage)
        del a, b
        # Much like test_boom(), except that __getattr__ doesn't break the
        # cycle until the second time gc checks for __del__.  As of 2.3b1,
        # there isn't a second time, so this simply cleans up the trash cycle.
        # We expect a, b, a.__dict__ and b.__dict__ (4 objects) to get
        # reclaimed this way.
        self.assertEqual(gc.collect(), 4)
        self.assertEqual(len(gc.garbage), garbagelen)

def test_boom_new(self):
        # boom__new and boom2_new are exactly like boom and boom2, except use
        # new-style classes.

class Boom_New(object):
            def __getattr__(self, someattribute):
                del self.attr
                raise AttributeError

a = Boom_New()
        b = Boom_New()
        a.attr = b
        b.attr = a

gc.collect()
        garbagelen = len(gc.garbage)
        del a, b
        self.assertEqual(gc.collect(), 4)
        self.assertEqual(len(gc.garbage), garbagelen)

def test_boom2_new(self):
        class Boom2_New(object):
            def __init__(self):
                self.x = 0

def __getattr__(self, someattribute):
                self.x += 1
                if self.x > 1:
                    del self.attr
                raise AttributeError

a = Boom2_New()
        b = Boom2_New()
        a.attr = b
        b.attr = a

gc.collect()
        garbagelen = len(gc.garbage)
        del a, b
        self.assertEqual(gc.collect(), 4)
        self.assertEqual(len(gc.garbage), garbagelen)

def test_get_referents(self):
        alist = [1, 3, 5]
        got = gc.get_referents(alist)
        got.sort()
        self.assertEqual(got, alist)

atuple = tuple(alist)
        got = gc.get_referents(atuple)
        got.sort()
        self.assertEqual(got, alist)

adict = {1: 3, 5: 7}
        expected = [1, 3, 5, 7]
        got = gc.get_referents(adict)
        got.sort()
        self.assertEqual(got, expected)

got = gc.get_referents([1, 2], {3: 4}, (0, 0, 0))
        got.sort()
        self.assertEqual(got, [0, 0] + list(range(5)))

self.assertEqual(gc.get_referents(1, 'a', 4j), [])

def test_is_tracked(self):
        # Atomic built-in types are not tracked, user-defined objects and
        # mutable containers are.
        # NOTE: types with special optimizations (e.g. tuple) have tests
        # in their own test files instead.
        self.assertFalse(gc.is_tracked(None))
        self.assertFalse(gc.is_tracked(1))
        self.assertFalse(gc.is_tracked(1.0))
        self.assertFalse(gc.is_tracked(1.0 + 5.0j))
        self.assertFalse(gc.is_tracked(True))
        self.assertFalse(gc.is_tracked(False))
        self.assertFalse(gc.is_tracked(b"a"))
        self.assertFalse(gc.is_tracked("a"))
        self.assertFalse(gc.is_tracked(bytearray(b"a")))
        self.assertFalse(gc.is_tracked(type))
        self.assertFalse(gc.is_tracked(int))
        self.assertFalse(gc.is_tracked(object))
        self.assertFalse(gc.is_tracked(object()))

class UserClass:
            pass

class UserInt(int):
            pass

# Base class is object; no extra fields.
        class UserClassSlots:
            __slots__ = ()

# Base class is fixed size larger than object; no extra fields.
        class UserFloatSlots(float):
            __slots__ = ()

# Base class is variable size; no extra fields.
        class UserIntSlots(int):
            __slots__ = ()

self.assertTrue(gc.is_tracked(gc))
        self.assertTrue(gc.is_tracked(UserClass))
        self.assertTrue(gc.is_tracked(UserClass()))
        self.assertTrue(gc.is_tracked(UserInt()))
        self.assertTrue(gc.is_tracked([]))
        self.assertTrue(gc.is_tracked(set()))
        self.assertTrue(gc.is_tracked(UserClassSlots()))
        self.assertTrue(gc.is_tracked(UserFloatSlots()))
        self.assertTrue(gc.is_tracked(UserIntSlots()))

def test_bug1055820b(self):
        # Corresponds to temp2b.py in the bug report.

ouch = []
        def callback(ignored):
            ouch[:] = [wr() for wr in WRs]

Cs = [C1055820(i) for i in range(2)]
        WRs = [weakref.ref(c, callback) for c in Cs]
        c = None

gc.collect()
        self.assertEqual(len(ouch), 0)
        # Make the two instances trash, and collect again.  The bug was that
        # the callback materialized a strong reference to an instance, but gc
        # cleared the instance's dict anyway.
        Cs = None
        gc.collect()
        self.assertEqual(len(ouch), 2)  # else the callbacks didn't run
        for x in ouch:
            # If the callback resurrected one of these guys, the instance
            # would be damaged, with an empty __dict__.
            self.assertEqual(x, None)

def test_bug21435(self):
        # This is a poor test - its only virtue is that it happened to
        # segfault on Tim's Windows box before the patch for 21435 was
        # applied.  That's a nasty bug relying on specific pieces of cyclic
        # trash appearing in exactly the right order in finalize_garbage()'s
        # input list.
        # But there's no reliable way to force that order from Python code,
        # so over time chances are good this test won't really be testing much
        # of anything anymore.  Still, if it blows up, there's _some_
        # problem ;-)
        gc.collect()

class A:
            pass

class B:
            def __init__(self, x):
                self.x = x

def __del__(self):
                self.attr = None

def do_work():
            a = A()
            b = B(A())

a.attr = b
            b.attr = a

do_work()
        gc.collect() # this blows up (bad C pointer) when it fails

@cpython_only
    def test_garbage_at_shutdown(self):
        import subprocess
        code = """if 1:
            import gc
            import _testcapi
            @_testcapi.with_tp_del
            class X:
                def __init__(self, name):
                    self.name = name
                def __repr__(self):
                    return "<X %%r>" %% self.name
                def __tp_del__(self):
                    pass

x = X('first')
            x.x = x
            x.y = X('second')
            del x
            gc.set_debug(%s)
        """
        def run_command(code):
            p = subprocess.Popen([sys.executable, "-Wd", "-c", code],
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE)
            stdout, stderr = p.communicate()
            p.stdout.close()
            p.stderr.close()
            self.assertEqual(p.returncode, 0)
            self.assertEqual(stdout.strip(), b"")
            return strip_python_stderr(stderr)

stderr = run_command(code % "0")
        self.assertIn(b"ResourceWarning: gc: 2 uncollectable objects at "
                      b"shutdown; use", stderr)
        self.assertNotIn(b"<X 'first'>", stderr)
        # With DEBUG_UNCOLLECTABLE, the garbage list gets printed
        stderr = run_command(code % "gc.DEBUG_UNCOLLECTABLE")
        self.assertIn(b"ResourceWarning: gc: 2 uncollectable objects at "
                      b"shutdown", stderr)
        self.assertTrue(
            (b"[<X 'first'>, <X 'second'>]" in stderr) or
            (b"[<X 'second'>, <X 'first'>]" in stderr), stderr)
        # With DEBUG_SAVEALL, no additional message should get printed
        # (because gc.garbage also contains normally reclaimable cyclic
        # references, and its elements get printed at runtime anyway).
        stderr = run_command(code % "gc.DEBUG_SAVEALL")
        self.assertNotIn(b"uncollectable objects at shutdown", stderr)

@requires_type_collecting
    def test_gc_main_module_at_shutdown(self):
        # Create a reference cycle through the __main__ module and check
        # it gets collected at interpreter shutdown.
        code = """if 1:
            class C:
                def __del__(self):
                    print('__del__ called')
            l = [C()]
            l.append(l)
            """
        rc, out, err = assert_python_ok('-c', code)
        self.assertEqual(out.strip(), b'__del__ called')

@requires_type_collecting
    def test_gc_ordinary_module_at_shutdown(self):
        # Same as above, but with a non-__main__ module.
        with temp_dir() as script_dir:
            module = """if 1:
                class C:
                    def __del__(self):
                        print('__del__ called')
                l = [C()]
                l.append(l)
                """
            code = """if 1:
                import sys
                sys.path.insert(0, %r)
                import gctest
                """ % (script_dir,)
            make_script(script_dir, 'gctest', module)
            rc, out, err = assert_python_ok('-c', code)
            self.assertEqual(out.strip(), b'__del__ called')

@requires_type_collecting
    def test_global_del_SystemExit(self):
        code = """if 1:
            class ClassWithDel:
                def __del__(self):
                    print('__del__ called')
            a = ClassWithDel()
            a.link = a
            raise SystemExit(0)"""
        self.addCleanup(unlink, TESTFN)
        with open(TESTFN, 'w') as script:
            script.write(code)
        rc, out, err = assert_python_ok(TESTFN)
        self.assertEqual(out.strip(), b'__del__ called')

def test_get_stats(self):
        stats = gc.get_stats()
        self.assertEqual(len(stats), 3)
        for st in stats:
            self.assertIsInstance(st, dict)
            self.assertEqual(set(st),
                             {"collected", "collections", "uncollectable"})
            self.assertGreaterEqual(st["collected"], 0)
            self.assertGreaterEqual(st["collections"], 0)
            self.assertGreaterEqual(st["uncollectable"], 0)
        # Check that collection counts are incremented correctly
        if gc.isenabled():
            self.addCleanup(gc.enable)
            gc.disable()
        old = gc.get_stats()
        gc.collect(0)
        new = gc.get_stats()
        self.assertEqual(new[0]["collections"], old[0]["collections"] + 1)
        self.assertEqual(new[1]["collections"], old[1]["collections"])
        self.assertEqual(new[2]["collections"], old[2]["collections"])
        gc.collect(2)
        new = gc.get_stats()
        self.assertEqual(new[0]["collections"], old[0]["collections"] + 1)
        self.assertEqual(new[1]["collections"], old[1]["collections"])
        self.assertEqual(new[2]["collections"], old[2]["collections"] + 1)

def test_freeze(self):
        gc.freeze()
        self.assertGreater(gc.get_freeze_count(), 0)
        gc.unfreeze()
        self.assertEqual(gc.get_freeze_count(), 0)

def test_get_objects(self):
        gc.collect()
        l = []
        l.append(l)
        self.assertTrue(
                any(l is element for element in gc.get_objects(generation=0))
        )
        self.assertFalse(
                any(l is element for element in  gc.get_objects(generation=1))
        )
        self.assertFalse(
                any(l is element for element in gc.get_objects(generation=2))
        )
        gc.collect(generation=0)
        self.assertFalse(
                any(l is element for element in gc.get_objects(generation=0))
        )
        self.assertTrue(
                any(l is element for element in  gc.get_objects(generation=1))
        )
        self.assertFalse(
                any(l is element for element in gc.get_objects(generation=2))
        )
        gc.collect(generation=1)
        self.assertFalse(
                any(l is element for element in gc.get_objects(generation=0))
        )
        self.assertFalse(
                any(l is element for element in  gc.get_objects(generation=1))
        )
        self.assertTrue(
                any(l is element for element in gc.get_objects(generation=2))
        )
        gc.collect(generation=2)
        self.assertFalse(
                any(l is element for element in gc.get_objects(generation=0))
        )
        self.assertFalse(
                any(l is element for element in  gc.get_objects(generation=1))
        )
        self.assertTrue(
                any(l is element for element in gc.get_objects(generation=2))
        )
        del l
        gc.collect()

def test_get_objects_arguments(self):
        gc.collect()
        self.assertEqual(len(gc.get_objects()),
                         len(gc.get_objects(generation=None)))

self.assertRaises(ValueError, gc.get_objects, 1000)
        self.assertRaises(ValueError, gc.get_objects, -1000)
        self.assertRaises(TypeError, gc.get_objects, "1")
        self.assertRaises(TypeError, gc.get_objects, 1.234)

def test_38379(self):
        # When a finalizer resurrects objects, stats were reporting them as
        # having been collected.  This affected both collect()'s return
        # value and the dicts returned by get_stats().
        N = 100

class A:  # simple self-loop
            def __init__(self):
                self.me = self

class Z(A):  # resurrecting __del__
            def __del__(self):
                zs.append(self)

zs = []

def getstats():
            d = gc.get_stats()[-1]
            return d['collected'], d['uncollectable']

gc.collect()
        gc.disable()

# No problems if just collecting A() instances.
        oldc, oldnc = getstats()
        for i in range(N):
            A()
        t = gc.collect()
        c, nc = getstats()
        self.assertEqual(t, 2*N) # instance object & its dict
        self.assertEqual(c - oldc, 2*N)
        self.assertEqual(nc - oldnc, 0)

# But Z() is not actually collected.
        oldc, oldnc = c, nc
        Z()
        # Nothing is collected - Z() is merely resurrected.
        t = gc.collect()
        c, nc = getstats()
        #self.assertEqual(t, 2)  # before
        self.assertEqual(t, 0)  # after
        #self.assertEqual(c - oldc, 2)   # before
        self.assertEqual(c - oldc, 0)   # after
        self.assertEqual(nc - oldnc, 0)

# Unfortunately, a Z() prevents _anything_ from being collected.
        # It should be possible to collect the A instances anyway, but
        # that will require non-trivial code changes.
        oldc, oldnc = c, nc
        for i in range(N):
            A()
        Z()
        # Z() prevents anything from being collected.
        t = gc.collect()
        c, nc = getstats()
        #self.assertEqual(t, 2*N + 2)  # before
        self.assertEqual(t, 0)  # after
        #self.assertEqual(c - oldc, 2*N + 2)   # before
        self.assertEqual(c - oldc, 0)   # after
        self.assertEqual(nc - oldnc, 0)

# But the A() trash is reclaimed on the next run.
        oldc, oldnc = c, nc
        t = gc.collect()
        c, nc = getstats()
        self.assertEqual(t, 2*N)
        self.assertEqual(c - oldc, 2*N)
        self.assertEqual(nc - oldnc, 0)

gc.enable()

class GCCallbackTests(unittest.TestCase):
    def setUp(self):
        # Save gc state and disable it.
        self.enabled = gc.isenabled()
        gc.disable()
        self.debug = gc.get_debug()
        gc.set_debug(0)
        gc.callbacks.append(self.cb1)
        gc.callbacks.append(self.cb2)
        self.othergarbage = []

def tearDown(self):
        # Restore gc state
        del self.visit
        gc.callbacks.remove(self.cb1)
        gc.callbacks.remove(self.cb2)
        gc.set_debug(self.debug)
        if self.enabled:
            gc.enable()
        # destroy any uncollectables
        gc.collect()
        for obj in gc.garbage:
            if isinstance(obj, Uncollectable):
                obj.partner = None
        del gc.garbage[:]
        del self.othergarbage
        gc.collect()

def preclean(self):
        # Remove all fluff from the system.  Invoke this function
        # manually rather than through self.setUp() for maximum
        # safety.
        self.visit = []
        gc.collect()
        garbage, gc.garbage[:] = gc.garbage[:], []
        self.othergarbage.append(garbage)
        self.visit = []

def cb1(self, phase, info):
        self.visit.append((1, phase, dict(info)))

def cb2(self, phase, info):
        self.visit.append((2, phase, dict(info)))
        if phase == "stop" and hasattr(self, "cleanup"):
            # Clean Uncollectable from garbage
            uc = [e for e in gc.garbage if isinstance(e, Uncollectable)]
            gc.garbage[:] = [e for e in gc.garbage
                             if not isinstance(e, Uncollectable)]
            for e in uc:
                e.partner = None

def test_collect(self):
        self.preclean()
        gc.collect()
        # Algorithmically verify the contents of self.visit
        # because it is long and tortuous.

# Count the number of visits to each callback
        n = [v[0] for v in self.visit]
        n1 = [i for i in n if i == 1]
        n2 = [i for i in n if i == 2]
        self.assertEqual(n1, [1]*2)
        self.assertEqual(n2, [2]*2)

# Count that we got the right number of start and stop callbacks.
        n = [v[1] for v in self.visit]
        n1 = [i for i in n if i == "start"]
        n2 = [i for i in n if i == "stop"]
        self.assertEqual(n1, ["start"]*2)
        self.assertEqual(n2, ["stop"]*2)

# Check that we got the right info dict for all callbacks
        for v in self.visit:
            info = v[2]
            self.assertTrue("generation" in info)
            self.assertTrue("collected" in info)
            self.assertTrue("uncollectable" in info)

def test_collect_generation(self):
        self.preclean()
        gc.collect(2)
        for v in self.visit:
            info = v[2]
            self.assertEqual(info["generation"], 2)

@cpython_only
    def test_collect_garbage(self):
        self.preclean()
        # Each of these cause four objects to be garbage: Two
        # Uncollectables and their instance dicts.
        Uncollectable()
        Uncollectable()
        C1055820(666)
        gc.collect()
        for v in self.visit:
            if v[1] != "stop":
                continue
            info = v[2]
            self.assertEqual(info["collected"], 2)
            self.assertEqual(info["uncollectable"], 8)

# We should now have the Uncollectables in gc.garbage
        self.assertEqual(len(gc.garbage), 4)
        for e in gc.garbage:
            self.assertIsInstance(e, Uncollectable)

# Now, let our callback handle the Uncollectable instances
        self.cleanup=True
        self.visit = []
        gc.garbage[:] = []
        gc.collect()
        for v in self.visit:
            if v[1] != "stop":
                continue
            info = v[2]
            self.assertEqual(info["collected"], 0)
            self.assertEqual(info["uncollectable"], 4)

# Uncollectables should be gone
        self.assertEqual(len(gc.garbage), 0)

@unittest.skipIf(BUILD_WITH_NDEBUG,
                     'built with -NDEBUG')
    def test_refcount_errors(self):
        self.preclean()
        # Verify the "handling" of objects with broken refcounts

# Skip the test if ctypes is not available
        import_module("ctypes")

import subprocess
        code = textwrap.dedent('''
            from test.support import gc_collect, SuppressCrashReport

a = [1, 2, 3]
            b = [a]

# Avoid coredump when Py_FatalError() calls abort()
            SuppressCrashReport().__enter__()

# Simulate the refcount of "a" being too low (compared to the
            # references held on it by live data), but keeping it above zero
            # (to avoid deallocating it):
            import ctypes
            ctypes.pythonapi.Py_DecRef(ctypes.py_object(a))

# The garbage collector should now have a fatal error
            # when it reaches the broken object
            gc_collect()
        ''')
        p = subprocess.Popen([sys.executable, "-c", code],
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE)
        stdout, stderr = p.communicate()
        p.stdout.close()
        p.stderr.close()
        # Verify that stderr has a useful error message:
        self.assertRegex(stderr,
            br'gcmodule\.c:[0-9]+: gc_decref: Assertion "gc_get_refs\(g\) > 0" failed.')
        self.assertRegex(stderr,
            br'refcount is too small')
        # "address : 0x7fb5062efc18"
        # "address : 7FB5062EFC18"
        address_regex = br'[0-9a-fA-Fx]+'
        self.assertRegex(stderr,
            br'object address  : ' + address_regex)
        self.assertRegex(stderr,
            br'object refcount : 1')
        self.assertRegex(stderr,
            br'object type     : ' + address_regex)
        self.assertRegex(stderr,
            br'object type name: list')
        self.assertRegex(stderr,
            br'object repr     : \[1, 2, 3\]')

class GCTogglingTests(unittest.TestCase):
    def setUp(self):
        gc.enable()

def tearDown(self):
        gc.disable()

def test_bug1055820c(self):
        # Corresponds to temp2c.py in the bug report.  This is pretty
        # elaborate.

c0 = C1055820(0)
        # Move c0 into generation 2.
        gc.collect()

c1 = C1055820(1)
        c1.keep_c0_alive = c0
        del c0.loop # now only c1 keeps c0 alive

c2 = C1055820(2)
        c2wr = weakref.ref(c2) # no callback!

ouch = []
        def callback(ignored):
            ouch[:] = [c2wr()]

# The callback gets associated with a wr on an object in generation 2.
        c0wr = weakref.ref(c0, callback)

c0 = c1 = c2 = None

# What we've set up:  c0, c1, and c2 are all trash now.  c0 is in
        # generation 2.  The only thing keeping it alive is that c1 points to
        # it. c1 and c2 are in generation 0, and are in self-loops.  There's a
        # global weakref to c2 (c2wr), but that weakref has no callback.
        # There's also a global weakref to c0 (c0wr), and that does have a
        # callback, and that callback references c2 via c2wr().
        #
        #               c0 has a wr with callback, which references c2wr
        #               ^
        #               |
        #               |     Generation 2 above dots
        #. . . . . . . .|. . . . . . . . . . . . . . . . . . . . . . . .
        #               |     Generation 0 below dots
        #               |
        #               |
        #            ^->c1   ^->c2 has a wr but no callback
        #            |  |    |  |
        #            <--v    <--v
        #
        # So this is the nightmare:  when generation 0 gets collected, we see
        # that c2 has a callback-free weakref, and c1 doesn't even have a
        # weakref.  Collecting generation 0 doesn't see c0 at all, and c0 is
        # the only object that has a weakref with a callback.  gc clears c1
        # and c2.  Clearing c1 has the side effect of dropping the refcount on
        # c0 to 0, so c0 goes away (despite that it's in an older generation)
        # and c0's wr callback triggers.  That in turn materializes a reference
        # to c2 via c2wr(), but c2 gets cleared anyway by gc.

# We want to let gc happen "naturally", to preserve the distinction
        # between generations.
        junk = []
        i = 0
        detector = GC_Detector()
        while not detector.gc_happened:
            i += 1
            if i > 10000:
                self.fail("gc didn't happen after 10000 iterations")
            self.assertEqual(len(ouch), 0)
            junk.append([])  # this will eventually trigger gc

self.assertEqual(len(ouch), 1)  # else the callback wasn't invoked
        for x in ouch:
            # If the callback resurrected c2, the instance would be damaged,
            # with an empty __dict__.
            self.assertEqual(x, None)

def test_bug1055820d(self):
        # Corresponds to temp2d.py in the bug report.  This is very much like
        # test_bug1055820c, but uses a __del__ method instead of a weakref
        # callback to sneak in a resurrection of cyclic trash.

ouch = []
        class D(C1055820):
            def __del__(self):
                ouch[:] = [c2wr()]

d0 = D(0)
        # Move all the above into generation 2.
        gc.collect()

c1 = C1055820(1)
        c1.keep_d0_alive = d0
        del d0.loop # now only c1 keeps d0 alive

c2 = C1055820(2)
        c2wr = weakref.ref(c2) # no callback!

d0 = c1 = c2 = None

# What we've set up:  d0, c1, and c2 are all trash now.  d0 is in
        # generation 2.  The only thing keeping it alive is that c1 points to
        # it.  c1 and c2 are in generation 0, and are in self-loops.  There's
        # a global weakref to c2 (c2wr), but that weakref has no callback.
        # There are no other weakrefs.
        #
        #               d0 has a __del__ method that references c2wr
        #               ^
        #               |
        #               |     Generation 2 above dots
        #. . . . . . . .|. . . . . . . . . . . . . . . . . . . . . . . .
        #               |     Generation 0 below dots
        #               |
        #               |
        #            ^->c1   ^->c2 has a wr but no callback
        #            |  |    |  |
        #            <--v    <--v
        #
        # So this is the nightmare:  when generation 0 gets collected, we see
        # that c2 has a callback-free weakref, and c1 doesn't even have a
        # weakref.  Collecting generation 0 doesn't see d0 at all.  gc clears
        # c1 and c2.  Clearing c1 has the side effect of dropping the refcount
        # on d0 to 0, so d0 goes away (despite that it's in an older
        # generation) and d0's __del__ triggers.  That in turn materializes
        # a reference to c2 via c2wr(), but c2 gets cleared anyway by gc.

# We want to let gc happen "naturally", to preserve the distinction
        # between generations.
        detector = GC_Detector()
        junk = []
        i = 0
        while not detector.gc_happened:
            i += 1
            if i > 10000:
                self.fail("gc didn't happen after 10000 iterations")
            self.assertEqual(len(ouch), 0)
            junk.append([])  # this will eventually trigger gc

self.assertEqual(len(ouch), 1)  # else __del__ wasn't invoked
        for x in ouch:
            # If __del__ resurrected c2, the instance would be damaged, with an
            # empty __dict__.
            self.assertEqual(x, None)

def test_main():
    enabled = gc.isenabled()
    gc.disable()
    assert not gc.isenabled()
    debug = gc.get_debug()
    gc.set_debug(debug & ~gc.DEBUG_LEAK) # this test is supposed to leak

try:
        gc.collect() # Delete 2nd generation garbage
        run_unittest(GCTests, GCTogglingTests, GCCallbackTests)
    finally:
        gc.set_debug(debug)
        # test gc.enable() even if GC is disabled by default
        if verbose:
            print("restoring automatic collection")
        # make sure to always test gc.enable()
        gc.enable()
        assert gc.isenabled()
        if not enabled:
            gc.disable()

if __name__ == "__main__":
    test_main()

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