[issue27840] functools.partial: don't copy keywoard arguments in partial_call()?

[Antoine Pitrou]

Antoine Pitrou added the comment:

Modifying the keyword arguments dict is quite common so this change would be a heavy compatibility breaker.

A well-known idiom:

  def some_function(..., **kwargs):
      some_option = kwargs.pop('some_option', None)
      # further process kwargs

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nosy: +pitrou

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<https://bugs.python.org/issue27840>
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