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Diffstat (limited to 'lib/python2.7/__future__.py')
-rw-r--r-- | lib/python2.7/__future__.py | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/lib/python2.7/__future__.py b/lib/python2.7/__future__.py deleted file mode 100644 index e0996eb..0000000 --- a/lib/python2.7/__future__.py +++ /dev/null @@ -1,128 +0,0 @@ -"""Record of phased-in incompatible language changes. - -Each line is of the form: - - FeatureName = "_Feature(" OptionalRelease "," MandatoryRelease "," - CompilerFlag ")" - -where, normally, OptionalRelease < MandatoryRelease, and both are 5-tuples -of the same form as sys.version_info: - - (PY_MAJOR_VERSION, # the 2 in 2.1.0a3; an int - PY_MINOR_VERSION, # the 1; an int - PY_MICRO_VERSION, # the 0; an int - PY_RELEASE_LEVEL, # "alpha", "beta", "candidate" or "final"; string - PY_RELEASE_SERIAL # the 3; an int - ) - -OptionalRelease records the first release in which - - from __future__ import FeatureName - -was accepted. - -In the case of MandatoryReleases that have not yet occurred, -MandatoryRelease predicts the release in which the feature will become part -of the language. - -Else MandatoryRelease records when the feature became part of the language; -in releases at or after that, modules no longer need - - from __future__ import FeatureName - -to use the feature in question, but may continue to use such imports. - -MandatoryRelease may also be None, meaning that a planned feature got -dropped. - -Instances of class _Feature have two corresponding methods, -.getOptionalRelease() and .getMandatoryRelease(). - -CompilerFlag is the (bitfield) flag that should be passed in the fourth -argument to the builtin function compile() to enable the feature in -dynamically compiled code. This flag is stored in the .compiler_flag -attribute on _Future instances. These values must match the appropriate -#defines of CO_xxx flags in Include/compile.h. - -No feature line is ever to be deleted from this file. -""" - -all_feature_names = [ - "nested_scopes", - "generators", - "division", - "absolute_import", - "with_statement", - "print_function", - "unicode_literals", -] - -__all__ = ["all_feature_names"] + all_feature_names - -# The CO_xxx symbols are defined here under the same names used by -# compile.h, so that an editor search will find them here. However, -# they're not exported in __all__, because they don't really belong to -# this module. -CO_NESTED = 0x0010 # nested_scopes -CO_GENERATOR_ALLOWED = 0 # generators (obsolete, was 0x1000) -CO_FUTURE_DIVISION = 0x2000 # division -CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # perform absolute imports by default -CO_FUTURE_WITH_STATEMENT = 0x8000 # with statement -CO_FUTURE_PRINT_FUNCTION = 0x10000 # print function -CO_FUTURE_UNICODE_LITERALS = 0x20000 # unicode string literals - -class _Feature: - def __init__(self, optionalRelease, mandatoryRelease, compiler_flag): - self.optional = optionalRelease - self.mandatory = mandatoryRelease - self.compiler_flag = compiler_flag - - def getOptionalRelease(self): - """Return first release in which this feature was recognized. - - This is a 5-tuple, of the same form as sys.version_info. - """ - - return self.optional - - def getMandatoryRelease(self): - """Return release in which this feature will become mandatory. - - This is a 5-tuple, of the same form as sys.version_info, or, if - the feature was dropped, is None. - """ - - return self.mandatory - - def __repr__(self): - return "_Feature" + repr((self.optional, - self.mandatory, - self.compiler_flag)) - -nested_scopes = _Feature((2, 1, 0, "beta", 1), - (2, 2, 0, "alpha", 0), - CO_NESTED) - -generators = _Feature((2, 2, 0, "alpha", 1), - (2, 3, 0, "final", 0), - CO_GENERATOR_ALLOWED) - -division = _Feature((2, 2, 0, "alpha", 2), - (3, 0, 0, "alpha", 0), - CO_FUTURE_DIVISION) - -absolute_import = _Feature((2, 5, 0, "alpha", 1), - (3, 0, 0, "alpha", 0), - CO_FUTURE_ABSOLUTE_IMPORT) - -with_statement = _Feature((2, 5, 0, "alpha", 1), - (2, 6, 0, "alpha", 0), - CO_FUTURE_WITH_STATEMENT) - -print_function = _Feature((2, 6, 0, "alpha", 2), - (3, 0, 0, "alpha", 0), - CO_FUTURE_PRINT_FUNCTION) - -unicode_literals = _Feature((2, 6, 0, "alpha", 2), - (3, 0, 0, "alpha", 0), - CO_FUTURE_UNICODE_LITERALS) |