| # pylint: disable=undefined-variable | |
| """test suspicious lambda expressions | |
| """ | |
| __revision__ = '' | |
| # Some simple examples of the most commonly encountered forms. | |
| # +1: [unnecessary-lambda] | |
| _ = lambda: list() # replaceable with "list" | |
| # +1: [unnecessary-lambda] | |
| _ = lambda x: hash(x) # replaceable with "hash" | |
| # +1: [unnecessary-lambda] | |
| _ = lambda x, y: min(x, y) # replaceable with "min" | |
| # A function that can take any arguments given to it. | |
| _ANYARGS = lambda *args, **kwargs: 'completely arbitrary return value' | |
| # Some more complex forms of unnecessary lambda expressions. | |
| # +1: [unnecessary-lambda] | |
| _ = lambda *args: _ANYARGS(*args) | |
| # +1: [unnecessary-lambda] | |
| _ = lambda **kwargs: _ANYARGS(**kwargs) | |
| # +1: [unnecessary-lambda] | |
| _ = lambda *args, **kwargs: _ANYARGS(*args, **kwargs) | |
| # +1: [unnecessary-lambda] | |
| _ = lambda x, y, z, *args, **kwargs: _ANYARGS(x, y, z, *args, **kwargs) | |
| # Lambdas that are *not* unnecessary and should *not* trigger warnings. | |
| _ = lambda x: x | |
| _ = lambda x: x() | |
| _ = lambda x=4: hash(x) | |
| _ = lambda x, y: list(range(y, x)) | |
| _ = lambda x: list(range(5, x)) | |
| _ = lambda x, y: list(range(x, 5)) | |
| _ = lambda x, y, z: x.y(z) | |
| _ = lambda: 5 | |
| _ = lambda **kwargs: _ANYARGS() | |
| _ = lambda **kwargs: _ANYARGS(**dict([('three', 3)])) | |
| _ = lambda **kwargs: _ANYARGS(**{'three': 3}) | |
| _ = lambda dict_arg, **kwargs: _ANYARGS(kwargs, **dict_arg) | |
| _ = lambda *args: _ANYARGS() | |
| _ = lambda *args: _ANYARGS(*list([3, 4])) | |
| _ = lambda *args: _ANYARGS(*[3, 4]) | |
| _ = lambda list_arg, *args: _ANYARGS(args, *list_arg) | |
| _ = lambda: _ANYARGS(*[3]) | |
| _ = lambda: _ANYARGS(**{'three': 3}) | |
| _ = lambda: _ANYARGS(*[3], **{'three': 3}) | |
| _ = lambda: _ANYARGS(func=42) | |
| # Don't warn about this. | |
| _ = lambda: code().analysis() | |
| _ = lambda **kwargs: dict(bar=42, **kwargs) |