def is_future_feature(object):
"""
Return True if C{object} results from a C{from __future__ import feature}
statement.
"""
# Guard from unexpected implementation changes of the __future__ module.
global __future_check_works
if __future_check_works is not None:
if __future_check_works:
import __future__
return isinstance(object, __future__._Feature)
else:
return False
else:
__future_check_works = True
try:
return is_future_feature(object)
except:
__future_check_works = False
log.warning("Troubles inspecting __future__. Python implementation"
" may have been changed.")
return False
python类_Feature()的实例源码
def testAllExported(self):
"""Test that all public attributes not imported are in __all__."""
missing_attributes = []
for attribute in dir(self.MODULE):
if not attribute.startswith('_'):
if attribute not in self.MODULE.__all__:
attribute_value = getattr(self.MODULE, attribute)
if isinstance(attribute_value, types.ModuleType):
continue
# pylint: disable=protected-access
if isinstance(attribute_value, __future__._Feature):
continue
missing_attributes.append(attribute)
if missing_attributes:
self.fail('%s are not modules and not defined in __all__.' %
missing_attributes)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
def test_names(self):
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
self.assertTrue(
name in given_feature_names,
"%r should have been in all_feature_names" % name
)
given_feature_names.remove(name)
self.assertEqual(len(given_feature_names), 0,
"all_feature_names has too much: %r" % given_feature_names)
