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# ticket: t455
def in_sequence(x, seq):
"""
>>> in_sequence(1, [])
False
>>> in_sequence(1, ())
False
>>> in_sequence(1, {})
False
>>> in_sequence(1, [1])
True
>>> in_sequence(1, (1,))
True
>>> in_sequence(1, {1:None})
True
>>> in_sequence(1, None) # doctest: +ELLIPSIS
Traceback (most recent call last):
TypeError: ...iterable...
>>> in_sequence(1, 1) # doctest: +ELLIPSIS
Traceback (most recent call last):
TypeError: ...iterable...
"""
return x in seq
def not_in_sequence(x, seq):
"""
>>> not_in_sequence(1, [])
True
>>> not_in_sequence(1, ())
True
>>> not_in_sequence(1, {})
True
>>> not_in_sequence(1, [1])
False
>>> not_in_sequence(1, (1,))
False
>>> not_in_sequence(1, {1:None})
False
>>> not_in_sequence(1, None) # doctest: +ELLIPSIS
Traceback (most recent call last):
TypeError: ...iterable...
>>> not_in_sequence(1, 1) # doctest: +ELLIPSIS
Traceback (most recent call last):
TypeError: ...iterable...
"""
return x not in seq
def in_dict(k, dict dct):
"""
>>> in_dict(1, {})
False
>>> in_dict(1, {1:None})
True
>>> in_dict(1, None)
Traceback (most recent call last):
...
TypeError: 'NoneType' object is not iterable
"""
return k in dct
def not_in_dict(k, dict dct):
"""
>>> not_in_dict(1, {})
True
>>> not_in_dict(1, {1:None})
False
>>> not_in_dict(1, None)
Traceback (most recent call last):
...
TypeError: 'NoneType' object is not iterable
"""
return k not in dct
def cascaded(a, b, c):
"""
>>> cascaded(1, 2, 3) # doctest: +ELLIPSIS
Traceback (most recent call last):
...
TypeError: ...iterable...
>>> cascaded(-1, (1,2), (1,3))
True
>>> cascaded(1, (1,2), (1,3))
False
>>> cascaded(-1, (1,2), (1,0))
False
"""
return a not in b < c
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