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# mode: run
# tag: is_not
cimport cython
# Use a single global object for identity checks.
# PyPy can optimise away integer objects, for example, and may fail the 'is' test.
obj = object()
@cython.test_fail_if_path_exists('//NotNode')
def is_not(a, b):
"""
>>> is_not(1, 2)
True
>>> x = obj
>>> is_not(x, x)
False
"""
return a is not b
@cython.test_fail_if_path_exists('//NotNode')
def not_is_not(a, b):
"""
>>> not_is_not(1, 2)
False
>>> x = obj
>>> not_is_not(x, x)
True
"""
return not a is not b
@cython.test_fail_if_path_exists('//NotNode')
def not_is(a, b):
"""
>>> not_is(1, 2)
True
>>> x = obj
>>> not_is(x, x)
False
"""
return not a is b
@cython.test_fail_if_path_exists('//NotNode')
def is_not_None(a):
"""
>>> is_not_None(1)
True
>>> is_not_None(None)
False
"""
return a is not None
@cython.test_fail_if_path_exists('//NotNode')
def not_is_not_None(a):
"""
>>> not_is_not_None(1)
False
>>> not_is_not_None(None)
True
"""
return not a is not None
@cython.test_fail_if_path_exists('//NotNode')
def not_is_None(a):
"""
>>> not_is_None(1)
True
>>> not_is_None(None)
False
"""
return not a is None
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