def extra(self, **kwargs):
    '\n        Add extra keys to the request body. Mostly here for backwards\n        compatibility.\n        '
    s = self._clone()
    if ('from_' in kwargs):
        kwargs['from'] = kwargs.pop('from_')
    s._extra.update(kwargs)
    return s
Add extra keys to the request body. Mostly here for backwards
compatibility.
def extra(self, **kwargs):
    '\n        Add extra keys to the request body. Mostly here for backwards\n        compatibility.\n        '
    s = self._clone()
    if ('from_' in kwargs):
        kwargs['from'] = kwargs.pop('from_')
    s._extra.update(kwargs)
    return s