def popitem(self):
            'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
            try:
                return self.maps[0].popitem()
            except KeyError:
                raise KeyError('No keys found in the first mapping.')
Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.
product/gradle-plugin/src/main/python/pip/_vendor/distlib/compat.py