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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _parse_access_token(self, resp_text):
        ' parse access token from urlencoded str like access_token=abcxyz&expires_in=123000&other=true '
        r = self._qs2dict(resp_text)
        access_token = r.pop('access_token')
        expires = time.time() + float(r.pop('expires_in'))
        return JsonDict(access_token=access_token, expires=expires, **r)