52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# pylint: disable=undefined-variable
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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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# +1: [unnecessary-lambda]
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_ = lambda: list() # replaceable with "list"
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# +1: [unnecessary-lambda]
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_ = lambda x: hash(x) # replaceable with "hash"
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# +1: [unnecessary-lambda]
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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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# +1: [unnecessary-lambda]
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_ = lambda *args: _ANYARGS(*args)
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# +1: [unnecessary-lambda]
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_ = lambda **kwargs: _ANYARGS(**kwargs)
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# +1: [unnecessary-lambda]
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_ = lambda *args, **kwargs: _ANYARGS(*args, **kwargs)
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# +1: [unnecessary-lambda]
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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: list(range(y, x))
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_ = lambda x: list(range(5, x))
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_ = lambda x, y: list(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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_ = lambda: _ANYARGS(func=42)
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# Don't warn about this.
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_ = lambda: code().analysis()
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