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Sine-1000Hz-300ms.aif
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__init__.py
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__main__.py
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__pycache__
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_test_multiprocessing.py
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allsans.pem
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ann_module.py
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ann_module2.py
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ann_module3.py
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audiodata
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audiotest.au
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audiotests.py
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audit-tests.py
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autotest.py
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bad_coding.py
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bad_coding2.py
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bad_getattr.py
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bad_getattr2.py
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bad_getattr3.py
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badcert.pem
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badkey.pem
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badsyntax_3131.py
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badsyntax_future10.py
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badsyntax_future3.py
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badsyntax_future4.py
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badsyntax_future5.py
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badsyntax_future6.py
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badsyntax_future7.py
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badsyntax_future8.py
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badsyntax_future9.py
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badsyntax_pep3120.py
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bisect_cmd.py
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bytecode_helper.py
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capath
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cfgparser.1
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cfgparser.2
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cfgparser.3
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cjkencodings
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clinic.test
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cmath_testcases.txt
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coding20731.py
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curses_tests.py
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data
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dataclass_module_1.py
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dataclass_module_1_str.py
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dataclass_module_2.py
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dataclass_module_2_str.py
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dataclass_textanno.py
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datetimetester.py
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decimaltestdata
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dis_module.py
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doctest_aliases.py
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double_const.py
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dtracedata
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eintrdata
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empty.vbs
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encoded_modules
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exception_hierarchy.txt
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ffdh3072.pem
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final_a.py
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final_b.py
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floating_points.txt
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fork_wait.py
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formatfloat_testcases.txt
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future_test1.py
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future_test2.py
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gdb_sample.py
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good_getattr.py
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idnsans.pem
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ieee754.txt
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imghdrdata
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imp_dummy.py
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inspect_fodder.py
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inspect_fodder2.py
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keycert.passwd.pem
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keycert.pem
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keycert2.pem
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keycert3.pem
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keycert4.pem
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keycertecc.pem
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libregrtest
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list_tests.py
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lock_tests.py
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mailcap.txt
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make_ssl_certs.py
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mapping_tests.py
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math_testcases.txt
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memory_watchdog.py
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mime.types
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mock_socket.py
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mod_generics_cache.py
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mp_fork_bomb.py
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mp_preload.py
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multibytecodec_support.py
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nokia.pem
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nosan.pem
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nullbytecert.pem
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nullcert.pem
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outstanding_bugs.py
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pickletester.py
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profilee.py
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pstats.pck
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pycacert.pem
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pycakey.pem
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pyclbr_input.py
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pydoc_mod.py
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pydocfodder.py
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pythoninfo.py
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randv2_32.pck
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randv2_64.pck
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randv3.pck
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re_tests.py
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recursion.tar
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regrtest.py
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relimport.py
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reperf.py
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revocation.crl
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sample_doctest.py
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sample_doctest_no_docstrings.py
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sample_doctest_no_doctests.py
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secp384r1.pem
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selfsigned_pythontestdotnet.pem
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seq_tests.py
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sgml_input.html
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signalinterproctester.py
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sndhdrdata
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sortperf.py
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ssl_cert.pem
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ssl_key.passwd.pem
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ssl_key.pem
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ssl_servers.py
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ssltests.py
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string_tests.py
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subprocessdata
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support
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talos-2019-0758.pem
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test___all__.py
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test___future__.py
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test__locale.py
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test__opcode.py
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test__osx_support.py
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test__xxsubinterpreters.py
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test_abc.py
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test_abstract_numbers.py
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test_aifc.py
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test_argparse.py
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test_array.py
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test_asdl_parser.py
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test_ast.py
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test_asyncgen.py
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test_asynchat.py
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test_asyncio
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test_asyncore.py
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test_atexit.py
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test_audioop.py
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test_audit.py
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test_augassign.py
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test_base64.py
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test_baseexception.py
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test_bdb.py
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test_bigaddrspace.py
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test_bigmem.py
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test_binascii.py
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test_binhex.py
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test_binop.py
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test_bisect.py
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test_bool.py
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test_buffer.py
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test_bufio.py
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test_builtin.py
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test_bytes.py
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test_bz2.py
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test_c_locale_coercion.py
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test_calendar.py
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test_call.py
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test_capi.py
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test_cgi.py
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test_cgitb.py
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test_charmapcodec.py
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test_class.py
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test_clinic.py
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test_cmath.py
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test_cmd.py
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test_cmd_line.py
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test_cmd_line_script.py
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test_code.py
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test_code_module.py
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test_codeccallbacks.py
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test_codecencodings_cn.py
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test_codecencodings_hk.py
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test_codecencodings_iso2022.py
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test_codecencodings_jp.py
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test_codecencodings_kr.py
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test_codecencodings_tw.py
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test_codecmaps_cn.py
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test_codecmaps_hk.py
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test_codecmaps_jp.py
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test_codecmaps_kr.py
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test_codecmaps_tw.py
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test_codecs.py
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test_codeop.py
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test_collections.py
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test_colorsys.py
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test_compare.py
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test_compile.py
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test_compileall.py
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test_complex.py
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test_concurrent_futures.py
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test_configparser.py
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test_contains.py
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test_context.py
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test_contextlib.py
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test_contextlib_async.py
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test_copy.py
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test_copyreg.py
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test_coroutines.py
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test_cprofile.py
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test_crashers.py
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test_crypt.py
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test_csv.py
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test_ctypes.py
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test_curses.py
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test_dataclasses.py
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test_datetime.py
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test_dbm.py
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test_dbm_dumb.py
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test_dbm_gnu.py
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test_dbm_ndbm.py
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test_decimal.py
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test_decorators.py
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test_defaultdict.py
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test_deque.py
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test_descr.py
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test_descrtut.py
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test_devpoll.py
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test_dict.py
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test_dict_version.py
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test_dictcomps.py
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test_dictviews.py
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test_difflib.py
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test_difflib_expect.html
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test_dis.py
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test_distutils.py
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test_doctest.py
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test_doctest.txt
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test_doctest2.py
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test_doctest2.txt
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test_doctest3.txt
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test_doctest4.txt
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test_docxmlrpc.py
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test_dtrace.py
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test_dummy_thread.py
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test_dummy_threading.py
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test_dynamic.py
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test_dynamicclassattribute.py
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test_eintr.py
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test_email
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test_embed.py
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test_ensurepip.py
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test_enum.py
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test_enumerate.py
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test_eof.py
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test_epoll.py
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test_errno.py
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test_exception_hierarchy.py
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test_exception_variations.py
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test_exceptions.py
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test_extcall.py
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test_faulthandler.py
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test_fcntl.py
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test_file.py
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test_file_eintr.py
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test_filecmp.py
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test_fileinput.py
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test_fileio.py
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test_finalization.py
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test_float.py
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test_flufl.py
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test_fnmatch.py
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test_fork1.py
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test_format.py
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test_fractions.py
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test_frame.py
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test_frozen.py
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test_fstring.py
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test_ftplib.py
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test_funcattrs.py
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test_functools.py
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test_future.py
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test_future3.py
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test_future4.py
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test_future5.py
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test_gc.py
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test_gdb.py
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test_generator_stop.py
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test_generators.py
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test_genericclass.py
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test_genericpath.py
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test_genexps.py
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test_getargs2.py
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test_getopt.py
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test_getpass.py
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test_gettext.py
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test_glob.py
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test_global.py
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test_grammar.py
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test_grp.py
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test_gzip.py
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test_hash.py
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test_hashlib.py
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test_heapq.py
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test_hmac.py
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test_html.py
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test_htmlparser.py
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test_http_cookiejar.py
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test_http_cookies.py
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test_httplib.py
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test_httpservers.py
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test_idle.py
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test_imaplib.py
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test_imghdr.py
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test_imp.py
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test_import
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test_importlib
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test_index.py
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test_inspect.py
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test_int.py
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test_int_literal.py
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test_io.py
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test_ioctl.py
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test_ipaddress.py
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test_isinstance.py
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test_iter.py
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test_iterlen.py
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test_itertools.py
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test_json
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test_keyword.py
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test_keywordonlyarg.py
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test_kqueue.py
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test_largefile.py
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test_lib2to3.py
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test_linecache.py
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test_list.py
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test_listcomps.py
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test_lltrace.py
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test_locale.py
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test_logging.py
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test_long.py
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test_longexp.py
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test_lzma.py
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test_mailbox.py
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test_mailcap.py
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test_marshal.py
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test_math.py
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test_memoryio.py
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test_memoryview.py
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test_metaclass.py
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test_mimetypes.py
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test_minidom.py
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test_mmap.py
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test_module.py
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test_modulefinder.py
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test_msilib.py
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test_multibytecodec.py
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test_multiprocessing_fork.py
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test_multiprocessing_forkserver.py
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test_multiprocessing_main_handling.py
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test_multiprocessing_spawn.py
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test_named_expressions.py
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test_netrc.py
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test_nis.py
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test_nntplib.py
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test_normalization.py
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test_ntpath.py
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test_numeric_tower.py
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test_opcodes.py
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test_openpty.py
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test_operator.py
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test_optparse.py
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test_ordered_dict.py
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test_os.py
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test_ossaudiodev.py
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test_osx_env.py
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test_parser.py
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test_pathlib.py
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test_pdb.py
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test_peepholer.py
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test_pickle.py
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test_picklebuffer.py
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test_pickletools.py
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test_pipes.py
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test_pkg.py
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test_pkgimport.py
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test_pkgutil.py
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ziptestdata
Editing: test_with.py
"""Unit tests for the with statement specified in PEP 343.""" __author__ = "Mike Bland" __email__ = "mbland at acm dot org" import sys import unittest from collections import deque from contextlib import _GeneratorContextManager, contextmanager class MockContextManager(_GeneratorContextManager): def __init__(self, *args): super().__init__(*args) self.enter_called = False self.exit_called = False self.exit_args = None def __enter__(self): self.enter_called = True return _GeneratorContextManager.__enter__(self) def __exit__(self, type, value, traceback): self.exit_called = True self.exit_args = (type, value, traceback) return _GeneratorContextManager.__exit__(self, type, value, traceback) def mock_contextmanager(func): def helper(*args, **kwds): return MockContextManager(func, args, kwds) return helper class MockResource(object): def __init__(self): self.yielded = False self.stopped = False @mock_contextmanager def mock_contextmanager_generator(): mock = MockResource() try: mock.yielded = True yield mock finally: mock.stopped = True class Nested(object): def __init__(self, *managers): self.managers = managers self.entered = None def __enter__(self): if self.entered is not None: raise RuntimeError("Context is not reentrant") self.entered = deque() vars = [] try: for mgr in self.managers: vars.append(mgr.__enter__()) self.entered.appendleft(mgr) except: if not self.__exit__(*sys.exc_info()): raise return vars def __exit__(self, *exc_info): # Behave like nested with statements # first in, last out # New exceptions override old ones ex = exc_info for mgr in self.entered: try: if mgr.__exit__(*ex): ex = (None, None, None) except: ex = sys.exc_info() self.entered = None if ex is not exc_info: raise ex[0](ex[1]).with_traceback(ex[2]) class MockNested(Nested): def __init__(self, *managers): Nested.__init__(self, *managers) self.enter_called = False self.exit_called = False self.exit_args = None def __enter__(self): self.enter_called = True return Nested.__enter__(self) def __exit__(self, *exc_info): self.exit_called = True self.exit_args = exc_info return Nested.__exit__(self, *exc_info) class FailureTestCase(unittest.TestCase): def testNameError(self): def fooNotDeclared(): with foo: pass self.assertRaises(NameError, fooNotDeclared) def testEnterAttributeError1(self): class LacksEnter(object): def __exit__(self, type, value, traceback): pass def fooLacksEnter(): foo = LacksEnter() with foo: pass self.assertRaisesRegex(AttributeError, '__enter__', fooLacksEnter) def testEnterAttributeError2(self): class LacksEnterAndExit(object): pass def fooLacksEnterAndExit(): foo = LacksEnterAndExit() with foo: pass self.assertRaisesRegex(AttributeError, '__enter__', fooLacksEnterAndExit) def testExitAttributeError(self): class LacksExit(object): def __enter__(self): pass def fooLacksExit(): foo = LacksExit() with foo: pass self.assertRaisesRegex(AttributeError, '__exit__', fooLacksExit) def assertRaisesSyntaxError(self, codestr): def shouldRaiseSyntaxError(s): compile(s, '', 'single') self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr) def testAssignmentToNoneError(self): self.assertRaisesSyntaxError('with mock as None:\n pass') self.assertRaisesSyntaxError( 'with mock as (None):\n' ' pass') def testAssignmentToTupleOnlyContainingNoneError(self): self.assertRaisesSyntaxError('with mock as None,:\n pass') self.assertRaisesSyntaxError( 'with mock as (None,):\n' ' pass') def testAssignmentToTupleContainingNoneError(self): self.assertRaisesSyntaxError( 'with mock as (foo, None, bar):\n' ' pass') def testEnterThrows(self): class EnterThrows(object): def __enter__(self): raise RuntimeError("Enter threw") def __exit__(self, *args): pass def shouldThrow(): ct = EnterThrows() self.foo = None with ct as self.foo: pass self.assertRaises(RuntimeError, shouldThrow) self.assertEqual(self.foo, None) def testExitThrows(self): class ExitThrows(object): def __enter__(self): return def __exit__(self, *args): raise RuntimeError(42) def shouldThrow(): with ExitThrows(): pass self.assertRaises(RuntimeError, shouldThrow) class ContextmanagerAssertionMixin(object): def setUp(self): self.TEST_EXCEPTION = RuntimeError("test exception") def assertInWithManagerInvariants(self, mock_manager): self.assertTrue(mock_manager.enter_called) self.assertFalse(mock_manager.exit_called) self.assertEqual(mock_manager.exit_args, None) def assertAfterWithManagerInvariants(self, mock_manager, exit_args): self.assertTrue(mock_manager.enter_called) self.assertTrue(mock_manager.exit_called) self.assertEqual(mock_manager.exit_args, exit_args) def assertAfterWithManagerInvariantsNoError(self, mock_manager): self.assertAfterWithManagerInvariants(mock_manager, (None, None, None)) def assertInWithGeneratorInvariants(self, mock_generator): self.assertTrue(mock_generator.yielded) self.assertFalse(mock_generator.stopped) def assertAfterWithGeneratorInvariantsNoError(self, mock_generator): self.assertTrue(mock_generator.yielded) self.assertTrue(mock_generator.stopped) def raiseTestException(self): raise self.TEST_EXCEPTION def assertAfterWithManagerInvariantsWithError(self, mock_manager, exc_type=None): self.assertTrue(mock_manager.enter_called) self.assertTrue(mock_manager.exit_called) if exc_type is None: self.assertEqual(mock_manager.exit_args[1], self.TEST_EXCEPTION) exc_type = type(self.TEST_EXCEPTION) self.assertEqual(mock_manager.exit_args[0], exc_type) # Test the __exit__ arguments. Issue #7853 self.assertIsInstance(mock_manager.exit_args[1], exc_type) self.assertIsNot(mock_manager.exit_args[2], None) def assertAfterWithGeneratorInvariantsWithError(self, mock_generator): self.assertTrue(mock_generator.yielded) self.assertTrue(mock_generator.stopped) class NonexceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin): def testInlineGeneratorSyntax(self): with mock_contextmanager_generator(): pass def testUnboundGenerator(self): mock = mock_contextmanager_generator() with mock: pass self.assertAfterWithManagerInvariantsNoError(mock) def testInlineGeneratorBoundSyntax(self): with mock_contextmanager_generator() as foo: self.assertInWithGeneratorInvariants(foo) # FIXME: In the future, we'll try to keep the bound names from leaking self.assertAfterWithGeneratorInvariantsNoError(foo) def testInlineGeneratorBoundToExistingVariable(self): foo = None with mock_contextmanager_generator() as foo: self.assertInWithGeneratorInvariants(foo) self.assertAfterWithGeneratorInvariantsNoError(foo) def testInlineGeneratorBoundToDottedVariable(self): with mock_contextmanager_generator() as self.foo: self.assertInWithGeneratorInvariants(self.foo) self.assertAfterWithGeneratorInvariantsNoError(self.foo) def testBoundGenerator(self): mock = mock_contextmanager_generator() with mock as foo: self.assertInWithGeneratorInvariants(foo) self.assertInWithManagerInvariants(mock) self.assertAfterWithGeneratorInvariantsNoError(foo) self.assertAfterWithManagerInvariantsNoError(mock) def testNestedSingleStatements(self): mock_a = mock_contextmanager_generator() with mock_a as foo: mock_b = mock_contextmanager_generator() with mock_b as bar: self.assertInWithManagerInvariants(mock_a) self.assertInWithManagerInvariants(mock_b) self.assertInWithGeneratorInvariants(foo) self.assertInWithGeneratorInvariants(bar) self.assertAfterWithManagerInvariantsNoError(mock_b) self.assertAfterWithGeneratorInvariantsNoError(bar) self.assertInWithManagerInvariants(mock_a) self.assertInWithGeneratorInvariants(foo) self.assertAfterWithManagerInvariantsNoError(mock_a) self.assertAfterWithGeneratorInvariantsNoError(foo) class NestedNonexceptionalTestCase(unittest.TestCase, ContextmanagerAssertionMixin): def testSingleArgInlineGeneratorSyntax(self): with Nested(mock_contextmanager_generator()): pass def testSingleArgBoundToNonTuple(self): m = mock_contextmanager_generator() # This will bind all the arguments to nested() into a single list # assigned to foo. with Nested(m) as foo: self.assertInWithManagerInvariants(m) self.assertAfterWithManagerInvariantsNoError(m) def testSingleArgBoundToSingleElementParenthesizedList(self): m = mock_contextmanager_generator() # This will bind all the arguments to nested() into a single list # assigned to foo. with Nested(m) as (foo): self.assertInWithManagerInvariants(m) self.assertAfterWithManagerInvariantsNoError(m) def testSingleArgBoundToMultipleElementTupleError(self): def shouldThrowValueError(): with Nested(mock_contextmanager_generator()) as (foo, bar): pass self.assertRaises(ValueError, shouldThrowValueError) def testSingleArgUnbound(self): mock_contextmanager = mock_contextmanager_generator() mock_nested = MockNested(mock_contextmanager) with mock_nested: self.assertInWithManagerInvariants(mock_contextmanager) self.assertInWithManagerInvariants(mock_nested) self.assertAfterWithManagerInvariantsNoError(mock_contextmanager) self.assertAfterWithManagerInvariantsNoError(mock_nested) def testMultipleArgUnbound(self): m = mock_contextmanager_generator() n = mock_contextmanager_generator() o = mock_contextmanager_generator() mock_nested = MockNested(m, n, o) with mock_nested: self.assertInWithManagerInvariants(m) self.assertInWithManagerInvariants(n) self.assertInWithManagerInvariants(o) self.assertInWithManagerInvariants(mock_nested) self.assertAfterWithManagerInvariantsNoError(m) self.assertAfterWithManagerInvariantsNoError(n) self.assertAfterWithManagerInvariantsNoError(o) self.assertAfterWithManagerInvariantsNoError(mock_nested) def testMultipleArgBound(self): mock_nested = MockNested(mock_contextmanager_generator(), mock_contextmanager_generator(), mock_contextmanager_generator()) with mock_nested as (m, n, o): self.assertInWithGeneratorInvariants(m) self.assertInWithGeneratorInvariants(n) self.assertInWithGeneratorInvariants(o) self.assertInWithManagerInvariants(mock_nested) self.assertAfterWithGeneratorInvariantsNoError(m) self.assertAfterWithGeneratorInvariantsNoError(n) self.assertAfterWithGeneratorInvariantsNoError(o) self.assertAfterWithManagerInvariantsNoError(mock_nested) class ExceptionalTestCase(ContextmanagerAssertionMixin, unittest.TestCase): def testSingleResource(self): cm = mock_contextmanager_generator() def shouldThrow(): with cm as self.resource: self.assertInWithManagerInvariants(cm) self.assertInWithGeneratorInvariants(self.resource) self.raiseTestException() self.assertRaises(RuntimeError, shouldThrow) self.assertAfterWithManagerInvariantsWithError(cm) self.assertAfterWithGeneratorInvariantsWithError(self.resource) def testExceptionNormalized(self): cm = mock_contextmanager_generator() def shouldThrow(): with cm as self.resource: # Note this relies on the fact that 1 // 0 produces an exception # that is not normalized immediately. 1 // 0 self.assertRaises(ZeroDivisionError, shouldThrow) self.assertAfterWithManagerInvariantsWithError(cm, ZeroDivisionError) def testNestedSingleStatements(self): mock_a = mock_contextmanager_generator() mock_b = mock_contextmanager_generator() def shouldThrow(): with mock_a as self.foo: with mock_b as self.bar: self.assertInWithManagerInvariants(mock_a) self.assertInWithManagerInvariants(mock_b) self.assertInWithGeneratorInvariants(self.foo) self.assertInWithGeneratorInvariants(self.bar) self.raiseTestException() self.assertRaises(RuntimeError, shouldThrow) self.assertAfterWithManagerInvariantsWithError(mock_a) self.assertAfterWithManagerInvariantsWithError(mock_b) self.assertAfterWithGeneratorInvariantsWithError(self.foo) self.assertAfterWithGeneratorInvariantsWithError(self.bar) def testMultipleResourcesInSingleStatement(self): cm_a = mock_contextmanager_generator() cm_b = mock_contextmanager_generator() mock_nested = MockNested(cm_a, cm_b) def shouldThrow(): with mock_nested as (self.resource_a, self.resource_b): self.assertInWithManagerInvariants(cm_a) self.assertInWithManagerInvariants(cm_b) self.assertInWithManagerInvariants(mock_nested) self.assertInWithGeneratorInvariants(self.resource_a) self.assertInWithGeneratorInvariants(self.resource_b) self.raiseTestException() self.assertRaises(RuntimeError, shouldThrow) self.assertAfterWithManagerInvariantsWithError(cm_a) self.assertAfterWithManagerInvariantsWithError(cm_b) self.assertAfterWithManagerInvariantsWithError(mock_nested) self.assertAfterWithGeneratorInvariantsWithError(self.resource_a) self.assertAfterWithGeneratorInvariantsWithError(self.resource_b) def testNestedExceptionBeforeInnerStatement(self): mock_a = mock_contextmanager_generator() mock_b = mock_contextmanager_generator() self.bar = None def shouldThrow(): with mock_a as self.foo: self.assertInWithManagerInvariants(mock_a) self.assertInWithGeneratorInvariants(self.foo) self.raiseTestException() with mock_b as self.bar: pass self.assertRaises(RuntimeError, shouldThrow) self.assertAfterWithManagerInvariantsWithError(mock_a) self.assertAfterWithGeneratorInvariantsWithError(self.foo) # The inner statement stuff should never have been touched self.assertEqual(self.bar, None) self.assertFalse(mock_b.enter_called) self.assertFalse(mock_b.exit_called) self.assertEqual(mock_b.exit_args, None) def testNestedExceptionAfterInnerStatement(self): mock_a = mock_contextmanager_generator() mock_b = mock_contextmanager_generator() def shouldThrow(): with mock_a as self.foo: with mock_b as self.bar: self.assertInWithManagerInvariants(mock_a) self.assertInWithManagerInvariants(mock_b) self.assertInWithGeneratorInvariants(self.foo) self.assertInWithGeneratorInvariants(self.bar) self.raiseTestException() self.assertRaises(RuntimeError, shouldThrow) self.assertAfterWithManagerInvariantsWithError(mock_a) self.assertAfterWithManagerInvariantsNoError(mock_b) self.assertAfterWithGeneratorInvariantsWithError(self.foo) self.assertAfterWithGeneratorInvariantsNoError(self.bar) def testRaisedStopIteration1(self): # From bug 1462485 @contextmanager def cm(): yield def shouldThrow(): with cm(): raise StopIteration("from with") with self.assertRaisesRegex(StopIteration, 'from with'): shouldThrow() def testRaisedStopIteration2(self): # From bug 1462485 class cm(object): def __enter__(self): pass def __exit__(self, type, value, traceback): pass def shouldThrow(): with cm(): raise StopIteration("from with") with self.assertRaisesRegex(StopIteration, 'from with'): shouldThrow() def testRaisedStopIteration3(self): # Another variant where the exception hasn't been instantiated # From bug 1705170 @contextmanager def cm(): yield def shouldThrow(): with cm(): raise next(iter([])) with self.assertRaises(StopIteration): shouldThrow() def testRaisedGeneratorExit1(self): # From bug 1462485 @contextmanager def cm(): yield def shouldThrow(): with cm(): raise GeneratorExit("from with") self.assertRaises(GeneratorExit, shouldThrow) def testRaisedGeneratorExit2(self): # From bug 1462485 class cm (object): def __enter__(self): pass def __exit__(self, type, value, traceback): pass def shouldThrow(): with cm(): raise GeneratorExit("from with") self.assertRaises(GeneratorExit, shouldThrow) def testErrorsInBool(self): # issue4589: __exit__ return code may raise an exception # when looking at its truth value. class cm(object): def __init__(self, bool_conversion): class Bool: def __bool__(self): return bool_conversion() self.exit_result = Bool() def __enter__(self): return 3 def __exit__(self, a, b, c): return self.exit_result def trueAsBool(): with cm(lambda: True): self.fail("Should NOT see this") trueAsBool() def falseAsBool(): with cm(lambda: False): self.fail("Should raise") self.assertRaises(AssertionError, falseAsBool) def failAsBool(): with cm(lambda: 1//0): self.fail("Should NOT see this") self.assertRaises(ZeroDivisionError, failAsBool) class NonLocalFlowControlTestCase(unittest.TestCase): def testWithBreak(self): counter = 0 while True: counter += 1 with mock_contextmanager_generator(): counter += 10 break counter += 100 # Not reached self.assertEqual(counter, 11) def testWithContinue(self): counter = 0 while True: counter += 1 if counter > 2: break with mock_contextmanager_generator(): counter += 10 continue counter += 100 # Not reached self.assertEqual(counter, 12) def testWithReturn(self): def foo(): counter = 0 while True: counter += 1 with mock_contextmanager_generator(): counter += 10 return counter counter += 100 # Not reached self.assertEqual(foo(), 11) def testWithYield(self): def gen(): with mock_contextmanager_generator(): yield 12 yield 13 x = list(gen()) self.assertEqual(x, [12, 13]) def testWithRaise(self): counter = 0 try: counter += 1 with mock_contextmanager_generator(): counter += 10 raise RuntimeError counter += 100 # Not reached except RuntimeError: self.assertEqual(counter, 11) else: self.fail("Didn't raise RuntimeError") class AssignmentTargetTestCase(unittest.TestCase): def testSingleComplexTarget(self): targets = {1: [0, 1, 2]} with mock_contextmanager_generator() as targets[1][0]: self.assertEqual(list(targets.keys()), [1]) self.assertEqual(targets[1][0].__class__, MockResource) with mock_contextmanager_generator() as list(targets.values())[0][1]: self.assertEqual(list(targets.keys()), [1]) self.assertEqual(targets[1][1].__class__, MockResource) with mock_contextmanager_generator() as targets[2]: keys = list(targets.keys()) keys.sort() self.assertEqual(keys, [1, 2]) class C: pass blah = C() with mock_contextmanager_generator() as blah.foo: self.assertEqual(hasattr(blah, "foo"), True) def testMultipleComplexTargets(self): class C: def __enter__(self): return 1, 2, 3 def __exit__(self, t, v, tb): pass targets = {1: [0, 1, 2]} with C() as (targets[1][0], targets[1][1], targets[1][2]): self.assertEqual(targets, {1: [1, 2, 3]}) with C() as (list(targets.values())[0][2], list(targets.values())[0][1], list(targets.values())[0][0]): self.assertEqual(targets, {1: [3, 2, 1]}) with C() as (targets[1], targets[2], targets[3]): self.assertEqual(targets, {1: 1, 2: 2, 3: 3}) class B: pass blah = B() with C() as (blah.one, blah.two, blah.three): self.assertEqual(blah.one, 1) self.assertEqual(blah.two, 2) self.assertEqual(blah.three, 3) class ExitSwallowsExceptionTestCase(unittest.TestCase): def testExitTrueSwallowsException(self): class AfricanSwallow: def __enter__(self): pass def __exit__(self, t, v, tb): return True try: with AfricanSwallow(): 1/0 except ZeroDivisionError: self.fail("ZeroDivisionError should have been swallowed") def testExitFalseDoesntSwallowException(self): class EuropeanSwallow: def __enter__(self): pass def __exit__(self, t, v, tb): return False try: with EuropeanSwallow(): 1/0 except ZeroDivisionError: pass else: self.fail("ZeroDivisionError should have been raised") class NestedWith(unittest.TestCase): class Dummy(object): def __init__(self, value=None, gobble=False): if value is None: value = self self.value = value self.gobble = gobble self.enter_called = False self.exit_called = False def __enter__(self): self.enter_called = True return self.value def __exit__(self, *exc_info): self.exit_called = True self.exc_info = exc_info if self.gobble: return True class InitRaises(object): def __init__(self): raise RuntimeError() class EnterRaises(object): def __enter__(self): raise RuntimeError() def __exit__(self, *exc_info): pass class ExitRaises(object): def __enter__(self): pass def __exit__(self, *exc_info): raise RuntimeError() def testNoExceptions(self): with self.Dummy() as a, self.Dummy() as b: self.assertTrue(a.enter_called) self.assertTrue(b.enter_called) self.assertTrue(a.exit_called) self.assertTrue(b.exit_called) def testExceptionInExprList(self): try: with self.Dummy() as a, self.InitRaises(): pass except: pass self.assertTrue(a.enter_called) self.assertTrue(a.exit_called) def testExceptionInEnter(self): try: with self.Dummy() as a, self.EnterRaises(): self.fail('body of bad with executed') except RuntimeError: pass else: self.fail('RuntimeError not reraised') self.assertTrue(a.enter_called) self.assertTrue(a.exit_called) def testExceptionInExit(self): body_executed = False with self.Dummy(gobble=True) as a, self.ExitRaises(): body_executed = True self.assertTrue(a.enter_called) self.assertTrue(a.exit_called) self.assertTrue(body_executed) self.assertNotEqual(a.exc_info[0], None) def testEnterReturnsTuple(self): with self.Dummy(value=(1,2)) as (a1, a2), \ self.Dummy(value=(10, 20)) as (b1, b2): self.assertEqual(1, a1) self.assertEqual(2, a2) self.assertEqual(10, b1) self.assertEqual(20, b2) if __name__ == '__main__': unittest.main()
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