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72 lines
1.9 KiB
Python
72 lines
1.9 KiB
Python
# Errors.
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nums = [1, 2, 3]
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map(lambda x: x + 1, nums)
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map(lambda x: str(x), nums)
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list(map(lambda x: x * 2, nums))
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set(map(lambda x: x % 2 == 0, nums))
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dict(map(lambda v: (v, v**2), nums))
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dict(map(lambda v: [v, v**2], nums))
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map(lambda _: 3.0, nums)
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_ = "".join(map(lambda x: x in nums and "1" or "0", range(123)))
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all(map(lambda v: isinstance(v, dict), nums))
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filter(func, map(lambda v: v, nums))
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# When inside f-string, then the fix should be surrounded by whitespace
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_ = f"{set(map(lambda x: x % 2 == 0, nums))}"
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_ = f"{dict(map(lambda v: (v, v**2), nums))}"
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# False negatives.
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map(lambda x=2, y=1: x + y, nums, nums)
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set(map(lambda x, y: x, nums, nums))
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def func(arg1: int, arg2: int = 4):
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return 2 * arg1 + arg2
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# Non-error: `func` is not a lambda.
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list(map(func, nums))
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# False positive: need to preserve the late-binding of `x` in the inner lambda.
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map(lambda x: lambda: x, range(4))
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# Error: the `x` is overridden by the inner lambda.
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map(lambda x: lambda x: x, range(4))
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# Ok because of the default parameters, and variadic arguments.
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map(lambda x=1: x, nums)
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map(lambda *args: len(args), range(4))
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map(lambda **kwargs: len(kwargs), range(4))
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# Ok because multiple arguments are allowed.
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dict(map(lambda k, v: (k, v), keys, values))
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# Regression test for: https://github.com/astral-sh/ruff/issues/7121
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map(lambda x: x, y if y else z)
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map(lambda x: x, (y if y else z))
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map(lambda x: x, (x, y, z))
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# See https://github.com/astral-sh/ruff/issues/14808
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# The following should be Ok since
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# named expressions are a syntax error inside comprehensions
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a = [1, 2, 3]
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b = map(lambda x: x, c := a)
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print(c)
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# Check nested as well
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map(lambda x:x, [c:=a])
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# https://github.com/astral-sh/ruff/issues/15796
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map(lambda: "const", nums)
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list(map(lambda x, y: x * y, nums))
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map(lambda: 1, "xyz")
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map(lambda x, y: x, [(1, 2), (3, 4)])
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list(map(lambda: 1, "xyz"))
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list(map(lambda x, y: x, [(1, 2), (3, 4)]))
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list(map(lambda: 1, "xyz"))
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list(map(lambda x, y: x, [(1, 2), (3, 4)]))
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