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41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
# pylint: disable-msg=W0142
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"""test suspicious lambda expressions
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"""
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__revision__ = ''
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# Some simple examples of the most commonly encountered forms.
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_ = lambda: list() # replaceable with "list"
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_ = lambda x: hash(x) # replaceable with "hash"
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_ = lambda x, y: min(x, y) # replaceable with "min"
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# A function that can take any arguments given to it.
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_ANYARGS = lambda *args, **kwargs: 'completely arbitrary return value'
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# Some more complex forms of unnecessary lambda expressions.
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_ = lambda *args: _ANYARGS(*args)
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_ = lambda **kwargs: _ANYARGS(**kwargs)
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_ = lambda *args, **kwargs: _ANYARGS(*args, **kwargs)
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_ = lambda x, y, z, *args, **kwargs: _ANYARGS(x, y, z, *args, **kwargs)
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# Lambdas that are *not* unnecessary and should *not* trigger warnings.
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_ = lambda x: x
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_ = lambda x: x()
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_ = lambda x = 4: hash(x)
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_ = lambda x, y: range(y, x)
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_ = lambda x: range(5, x)
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_ = lambda x, y: range(x, 5)
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_ = lambda x, y, z: x.y(z)
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_ = lambda: 5
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_ = lambda **kwargs: _ANYARGS()
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_ = lambda **kwargs: _ANYARGS(**dict([('three', 3)]))
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_ = lambda **kwargs: _ANYARGS(**{'three': 3})
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_ = lambda dict_arg, **kwargs: _ANYARGS(kwargs, **dict_arg)
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_ = lambda *args: _ANYARGS()
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_ = lambda *args: _ANYARGS(*list([3, 4]))
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_ = lambda *args: _ANYARGS(*[3, 4])
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_ = lambda list_arg, *args: _ANYARGS(args, *list_arg)
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_ = lambda: _ANYARGS(*[3])
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_ = lambda: _ANYARGS(**{'three': 3})
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_ = lambda: _ANYARGS(*[3], **{'three': 3})
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