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: http://www.stsci.edu/spst/UnixTransition/doc/__future__.html
Дата изменения: Thu Nov 5 13:46:15 2015 Дата индексирования: Mon Apr 11 00:37:53 2016 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п |
| __future__ | index /usr/local/Python-2.5/lib/python2.5/__future__.py Module Docs |
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.
| Data | ||
| __all__ = ['all_feature_names', 'nested_scopes', 'generators', 'division', 'absolute_import', 'with_statement'] absolute_import = _Feature((2, 5, 0, 'alpha', 1), (2, 7, 0, 'alpha', 0), 16384) all_feature_names = ['nested_scopes', 'generators', 'division', 'absolute_import', 'with_statement'] division = _Feature((2, 2, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0), 8192) generators = _Feature((2, 2, 0, 'alpha', 1), (2, 3, 0, 'final', 0), 0) nested_scopes = _Feature((2, 1, 0, 'beta', 1), (2, 2, 0, 'alpha', 0), 16) with_statement = _Feature((2, 5, 0, 'alpha', 1), (2, 6, 0, 'alpha', 0), 32768) | ||