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Add a bunch of stdlib modules from CPython
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‎Lib/__future__.py‎

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"""Record of phased-in incompatible language changes.
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Each line is of the form:
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FeatureName = "_Feature(" OptionalRelease "," MandatoryRelease ","
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CompilerFlag ")"
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where, normally, OptionalRelease < MandatoryRelease, and both are 5-tuples
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of the same form as sys.version_info:
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(PY_MAJOR_VERSION, # the 2 in 2.1.0a3; an int
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PY_MINOR_VERSION, # the 1; an int
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PY_MICRO_VERSION, # the 0; an int
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PY_RELEASE_LEVEL, # "alpha", "beta", "candidate" or "final"; string
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PY_RELEASE_SERIAL # the 3; an int
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)
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OptionalRelease records the first release in which
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from __future__ import FeatureName
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was accepted.
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In the case of MandatoryReleases that have not yet occurred,
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MandatoryRelease predicts the release in which the feature will become part
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of the language.
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Else MandatoryRelease records when the feature became part of the language;
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in releases at or after that, modules no longer need
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from __future__ import FeatureName
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to use the feature in question, but may continue to use such imports.
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MandatoryRelease may also be None, meaning that a planned feature got
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dropped.
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Instances of class _Feature have two corresponding methods,
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.getOptionalRelease() and .getMandatoryRelease().
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CompilerFlag is the (bitfield) flag that should be passed in the fourth
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argument to the builtin function compile() to enable the feature in
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dynamically compiled code. This flag is stored in the .compiler_flag
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attribute on _Future instances. These values must match the appropriate
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#defines of CO_xxx flags in Include/compile.h.
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No feature line is ever to be deleted from this file.
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"""
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all_feature_names = [
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"nested_scopes",
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"generators",
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"division",
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"absolute_import",
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"with_statement",
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"print_function",
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"unicode_literals",
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"barry_as_FLUFL",
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"generator_stop",
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]
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__all__ = ["all_feature_names"] + all_feature_names
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# The CO_xxx symbols are defined here under the same names used by
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# compile.h, so that an editor search will find them here. However,
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# they're not exported in __all__, because they don't really belong to
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# this module.
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CO_NESTED = 0x0010 # nested_scopes
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CO_GENERATOR_ALLOWED = 0 # generators (obsolete, was 0x1000)
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CO_FUTURE_DIVISION = 0x2000 # division
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CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # perform absolute imports by default
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CO_FUTURE_WITH_STATEMENT = 0x8000 # with statement
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CO_FUTURE_PRINT_FUNCTION = 0x10000 # print function
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CO_FUTURE_UNICODE_LITERALS = 0x20000 # unicode string literals
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CO_FUTURE_BARRY_AS_BDFL = 0x40000
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CO_FUTURE_GENERATOR_STOP = 0x80000 # StopIteration becomes RuntimeError in generators
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class _Feature:
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def __init__(self, optionalRelease, mandatoryRelease, compiler_flag):
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self.optional = optionalRelease
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self.mandatory = mandatoryRelease
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self.compiler_flag = compiler_flag
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def getOptionalRelease(self):
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"""Return first release in which this feature was recognized.
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This is a 5-tuple, of the same form as sys.version_info.
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"""
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return self.optional
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def getMandatoryRelease(self):
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"""Return release in which this feature will become mandatory.
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This is a 5-tuple, of the same form as sys.version_info, or, if
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the feature was dropped, is None.
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"""
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return self.mandatory
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def __repr__(self):
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return "_Feature" + repr((self.optional,
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self.mandatory,
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self.compiler_flag))
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nested_scopes = _Feature((2, 1, 0, "beta", 1),
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(2, 2, 0, "alpha", 0),
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CO_NESTED)
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generators = _Feature((2, 2, 0, "alpha", 1),
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(2, 3, 0, "final", 0),
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CO_GENERATOR_ALLOWED)
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division = _Feature((2, 2, 0, "alpha", 2),
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(3, 0, 0, "alpha", 0),
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CO_FUTURE_DIVISION)
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absolute_import = _Feature((2, 5, 0, "alpha", 1),
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(3, 0, 0, "alpha", 0),
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CO_FUTURE_ABSOLUTE_IMPORT)
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with_statement = _Feature((2, 5, 0, "alpha", 1),
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(2, 6, 0, "alpha", 0),
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CO_FUTURE_WITH_STATEMENT)
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print_function = _Feature((2, 6, 0, "alpha", 2),
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(3, 0, 0, "alpha", 0),
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CO_FUTURE_PRINT_FUNCTION)
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unicode_literals = _Feature((2, 6, 0, "alpha", 2),
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(3, 0, 0, "alpha", 0),
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CO_FUTURE_UNICODE_LITERALS)
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barry_as_FLUFL = _Feature((3, 1, 0, "alpha", 2),
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(3, 9, 0, "alpha", 0),
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CO_FUTURE_BARRY_AS_BDFL)
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generator_stop = _Feature((3, 5, 0, "beta", 1),
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(3, 7, 0, "alpha", 0),
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CO_FUTURE_GENERATOR_STOP)

‎Lib/_compat_pickle.py‎

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# This module is used to map the old Python 2 names to the new names used in
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# Python 3 for the pickle module. This needed to make pickle streams
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# generated with Python 2 loadable by Python 3.
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# This is a copy of lib2to3.fixes.fix_imports.MAPPING. We cannot import
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# lib2to3 and use the mapping defined there, because lib2to3 uses pickle.
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# Thus, this could cause the module to be imported recursively.
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IMPORT_MAPPING = {
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'__builtin__' : 'builtins',
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'copy_reg': 'copyreg',
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'Queue': 'queue',
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'SocketServer': 'socketserver',
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'ConfigParser': 'configparser',
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'repr': 'reprlib',
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'tkFileDialog': 'tkinter.filedialog',
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'tkSimpleDialog': 'tkinter.simpledialog',
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'tkColorChooser': 'tkinter.colorchooser',
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'tkCommonDialog': 'tkinter.commondialog',
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'Dialog': 'tkinter.dialog',
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'Tkdnd': 'tkinter.dnd',
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'tkFont': 'tkinter.font',
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'tkMessageBox': 'tkinter.messagebox',
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'ScrolledText': 'tkinter.scrolledtext',
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'Tkconstants': 'tkinter.constants',
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'Tix': 'tkinter.tix',
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'ttk': 'tkinter.ttk',
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'Tkinter': 'tkinter',
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'markupbase': '_markupbase',
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'_winreg': 'winreg',
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'thread': '_thread',
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'dummy_thread': '_dummy_thread',
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'dbhash': 'dbm.bsd',
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'dumbdbm': 'dbm.dumb',
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'dbm': 'dbm.ndbm',
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'gdbm': 'dbm.gnu',
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'xmlrpclib': 'xmlrpc.client',
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'SimpleXMLRPCServer': 'xmlrpc.server',
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'httplib': 'http.client',
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'htmlentitydefs' : 'html.entities',
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'HTMLParser' : 'html.parser',
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'Cookie': 'http.cookies',
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'cookielib': 'http.cookiejar',
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'BaseHTTPServer': 'http.server',
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'test.test_support': 'test.support',
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'commands': 'subprocess',
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'urlparse' : 'urllib.parse',
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'robotparser' : 'urllib.robotparser',
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'urllib2': 'urllib.request',
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'anydbm': 'dbm',
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'_abcoll' : 'collections.abc',
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}
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# This contains rename rules that are easy to handle. We ignore the more
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# complex stuff (e.g. mapping the names in the urllib and types modules).
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# These rules should be run before import names are fixed.
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NAME_MAPPING = {
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('__builtin__', 'xrange'): ('builtins', 'range'),
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('__builtin__', 'reduce'): ('functools', 'reduce'),
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('__builtin__', 'intern'): ('sys', 'intern'),
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('__builtin__', 'unichr'): ('builtins', 'chr'),
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('__builtin__', 'unicode'): ('builtins', 'str'),
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('__builtin__', 'long'): ('builtins', 'int'),
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('itertools', 'izip'): ('builtins', 'zip'),
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('itertools', 'imap'): ('builtins', 'map'),
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('itertools', 'ifilter'): ('builtins', 'filter'),
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('itertools', 'ifilterfalse'): ('itertools', 'filterfalse'),
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('itertools', 'izip_longest'): ('itertools', 'zip_longest'),
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('UserDict', 'IterableUserDict'): ('collections', 'UserDict'),
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('UserList', 'UserList'): ('collections', 'UserList'),
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('UserString', 'UserString'): ('collections', 'UserString'),
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('whichdb', 'whichdb'): ('dbm', 'whichdb'),
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('_socket', 'fromfd'): ('socket', 'fromfd'),
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('_multiprocessing', 'Connection'): ('multiprocessing.connection', 'Connection'),
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('multiprocessing.process', 'Process'): ('multiprocessing.context', 'Process'),
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('multiprocessing.forking', 'Popen'): ('multiprocessing.popen_fork', 'Popen'),
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('urllib', 'ContentTooShortError'): ('urllib.error', 'ContentTooShortError'),
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('urllib', 'getproxies'): ('urllib.request', 'getproxies'),
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('urllib', 'pathname2url'): ('urllib.request', 'pathname2url'),
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('urllib', 'quote_plus'): ('urllib.parse', 'quote_plus'),
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('urllib', 'quote'): ('urllib.parse', 'quote'),
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('urllib', 'unquote_plus'): ('urllib.parse', 'unquote_plus'),
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('urllib', 'unquote'): ('urllib.parse', 'unquote'),
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('urllib', 'url2pathname'): ('urllib.request', 'url2pathname'),
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('urllib', 'urlcleanup'): ('urllib.request', 'urlcleanup'),
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('urllib', 'urlencode'): ('urllib.parse', 'urlencode'),
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('urllib', 'urlopen'): ('urllib.request', 'urlopen'),
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('urllib', 'urlretrieve'): ('urllib.request', 'urlretrieve'),
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('urllib2', 'HTTPError'): ('urllib.error', 'HTTPError'),
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('urllib2', 'URLError'): ('urllib.error', 'URLError'),
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}
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PYTHON2_EXCEPTIONS = (
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"ArithmeticError",
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"AssertionError",
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"AttributeError",
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"BaseException",
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"BufferError",
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"BytesWarning",
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"DeprecationWarning",
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"EOFError",
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"EnvironmentError",
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"Exception",
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"FloatingPointError",
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"FutureWarning",
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"GeneratorExit",
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"IOError",
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"ImportError",
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"ImportWarning",
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"IndentationError",
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"IndexError",
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"KeyError",
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"KeyboardInterrupt",
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"LookupError",
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"MemoryError",
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"NameError",
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"NotImplementedError",
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"OSError",
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"OverflowError",
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"PendingDeprecationWarning",
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"ReferenceError",
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"RuntimeError",
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"RuntimeWarning",
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# StandardError is gone in Python 3, so we map it to Exception
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"StopIteration",
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"SyntaxError",
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"SyntaxWarning",
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"SystemError",
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"SystemExit",
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"TabError",
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"TypeError",
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"UnboundLocalError",
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"UnicodeDecodeError",
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"UnicodeEncodeError",
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"UnicodeError",
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"UnicodeTranslateError",
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"UnicodeWarning",
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"UserWarning",
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"ValueError",
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"Warning",
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"ZeroDivisionError",
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)
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try:
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WindowsError
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except NameError:
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pass
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else:
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PYTHON2_EXCEPTIONS += ("WindowsError",)
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for excname in PYTHON2_EXCEPTIONS:
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NAME_MAPPING[("exceptions", excname)] = ("builtins", excname)
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MULTIPROCESSING_EXCEPTIONS = (
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'AuthenticationError',
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'BufferTooShort',
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'ProcessError',
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'TimeoutError',
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)
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for excname in MULTIPROCESSING_EXCEPTIONS:
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NAME_MAPPING[("multiprocessing", excname)] = ("multiprocessing.context", excname)
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# Same, but for 3.x to 2.x
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REVERSE_IMPORT_MAPPING = dict((v, k) for (k, v) in IMPORT_MAPPING.items())
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assert len(REVERSE_IMPORT_MAPPING) == len(IMPORT_MAPPING)
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REVERSE_NAME_MAPPING = dict((v, k) for (k, v) in NAME_MAPPING.items())
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assert len(REVERSE_NAME_MAPPING) == len(NAME_MAPPING)
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# Non-mutual mappings.
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IMPORT_MAPPING.update({
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'cPickle': 'pickle',
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'_elementtree': 'xml.etree.ElementTree',
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'FileDialog': 'tkinter.filedialog',
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'SimpleDialog': 'tkinter.simpledialog',
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'DocXMLRPCServer': 'xmlrpc.server',
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'SimpleHTTPServer': 'http.server',
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'CGIHTTPServer': 'http.server',
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# For compatibility with broken pickles saved in old Python 3 versions
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'UserDict': 'collections',
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'UserList': 'collections',
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'UserString': 'collections',
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'whichdb': 'dbm',
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'StringIO': 'io',
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'cStringIO': 'io',
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})
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REVERSE_IMPORT_MAPPING.update({
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'_bz2': 'bz2',
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'_dbm': 'dbm',
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'_functools': 'functools',
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'_gdbm': 'gdbm',
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'_pickle': 'pickle',
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})
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NAME_MAPPING.update({
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('__builtin__', 'basestring'): ('builtins', 'str'),
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('exceptions', 'StandardError'): ('builtins', 'Exception'),
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('UserDict', 'UserDict'): ('collections', 'UserDict'),
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('socket', '_socketobject'): ('socket', 'SocketType'),
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})
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REVERSE_NAME_MAPPING.update({
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('_functools', 'reduce'): ('__builtin__', 'reduce'),
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('tkinter.filedialog', 'FileDialog'): ('FileDialog', 'FileDialog'),
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('tkinter.filedialog', 'LoadFileDialog'): ('FileDialog', 'LoadFileDialog'),
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('tkinter.filedialog', 'SaveFileDialog'): ('FileDialog', 'SaveFileDialog'),
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('tkinter.simpledialog', 'SimpleDialog'): ('SimpleDialog', 'SimpleDialog'),
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('xmlrpc.server', 'ServerHTMLDoc'): ('DocXMLRPCServer', 'ServerHTMLDoc'),
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('xmlrpc.server', 'XMLRPCDocGenerator'):
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('DocXMLRPCServer', 'XMLRPCDocGenerator'),
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('xmlrpc.server', 'DocXMLRPCRequestHandler'):
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('DocXMLRPCServer', 'DocXMLRPCRequestHandler'),
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('xmlrpc.server', 'DocXMLRPCServer'):
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('DocXMLRPCServer', 'DocXMLRPCServer'),
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('xmlrpc.server', 'DocCGIXMLRPCRequestHandler'):
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('DocXMLRPCServer', 'DocCGIXMLRPCRequestHandler'),
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('http.server', 'SimpleHTTPRequestHandler'):
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('SimpleHTTPServer', 'SimpleHTTPRequestHandler'),
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('http.server', 'CGIHTTPRequestHandler'):
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('CGIHTTPServer', 'CGIHTTPRequestHandler'),
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('_socket', 'socket'): ('socket', '_socketobject'),
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})
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PYTHON3_OSERROR_EXCEPTIONS = (
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'BrokenPipeError',
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'ChildProcessError',
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'ConnectionAbortedError',
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'ConnectionError',
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'ConnectionRefusedError',
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'ConnectionResetError',
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'FileExistsError',
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'FileNotFoundError',
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'InterruptedError',
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'IsADirectoryError',
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'NotADirectoryError',
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'PermissionError',
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'ProcessLookupError',
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'TimeoutError',
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)
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for excname in PYTHON3_OSERROR_EXCEPTIONS:
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REVERSE_NAME_MAPPING[('builtins', excname)] = ('exceptions', 'OSError')
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PYTHON3_IMPORTERROR_EXCEPTIONS = (
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'ModuleNotFoundError',
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)
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for excname in PYTHON3_IMPORTERROR_EXCEPTIONS:
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REVERSE_NAME_MAPPING[('builtins', excname)] = ('exceptions', 'ImportError')

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