18 lines
586 B
Python
18 lines
586 B
Python
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from django.utils.version import PY313
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if PY313:
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from copy import replace
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else:
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# Backport of copy.replace() from Python 3.13.
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def replace(obj, /, **changes):
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"""Return a new object replacing specified fields with new values.
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This is especially useful for immutable objects, like named tuples or
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frozen dataclasses.
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"""
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cls = obj.__class__
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func = getattr(cls, "__replace__", None)
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if func is None:
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raise TypeError(f"replace() does not support {cls.__name__} objects")
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return func(obj, **changes)
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