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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 set_basic_auth(self, username, password, realm):
 """ Set up basic auth for the client @param username: Login name. @param password: Login password. @param realm: The authentication realm. @return: The current object """

    self._passmgr.add_password(realm, self._base_url, username, password)
    return self