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@@ -196,3 +196,20 @@ assert "123|456\n98|76|54".splitlines() | PipeMap(lambda s: s.split("|")) | Pipe
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((1, 2, 3), (4, 5, 6)),
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((9, 8), (7, 6), (5, 4)),
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]
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+
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+
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+class PipePair(PipeMap):
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+ def __init__(
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+ self, function: typing.Callable[[typing.Any], typing.Any], axis: int = 0
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+ ) -> None:
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+ super().__init__(function=lambda a: (a, function(a)), axis=axis)
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+
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+
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+assert range(65, 68) | PipePair(chr) | Pipe(list) == [
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+ (65, "A"),
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+ (66, "B"),
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+ (67, "C"),
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+]
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+assert range(2, 4) | PipeMap(range) | PipePair(lambda n: n**3, axis=1) | PipeMap(
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+ set
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+) | Pipe(list) == [{(0, 0), (1, 1)}, {(0, 0), (1, 1), (2, 8)}]
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