16 lines
483 B
Python
16 lines
483 B
Python
from typing import Any, Callable, Iterable, List
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def unique(
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values: Iterable[Any], *, key: Callable[[Any], Any] = lambda v: v
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) -> List[Any]:
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"""Only keep first occurrences and maintian order"""
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key_values = {}
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for v in values:
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k = key(v)
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if k not in key_values:
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# dicts maintin insertion order: https://mail.python.org/pipermail/python-dev/2017-December/151283.html
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key_values[k] = v
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return list(key_values.values())
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