Function _warn_python_reduce_kwargs

Lib/functools.py:1182–1196

(py_reduce)

    __class_getitem__ = classmethod(GenericAlias)

def _warn_python_reduce_kwargs(py_reduce):
    @wraps(py_reduce)
    def wrapper(*args, **kwargs):
        if 'function' in kwargs or 'sequence' in kwargs:
            import os
            import warnings
            warnings.warn(
                'Calling functools.reduce with keyword arguments '
                '"function" or "sequence" '
                'is deprecated in Python 3.14 and will be '
                'forbidden in Python 3.16.',
                DeprecationWarning,
                skip_file_prefixes=(os.path.dirname(__file__),))
        return py_reduce(*args, **kwargs)
    return wrapper

reduce = _warn_python_reduce_kwargs(reduce)
del _warn_python_reduce_kwargs