Function _set_new_attribute

Lib/dataclasses.py:922–928

(cls, name, value)

    return f

def _set_new_attribute(cls, name, value):
    # Never overwrites an existing attribute.  Returns True if the
    # attribute already exists.
    if name in cls.__dict__:
        return True
    setattr(cls, name, value)
    return False


# Decide if/how we're going to create a hash function.  Key is