code: def get_local(self, variable_name):
          '''
          Return the value of the local variable. Raises UnknownVariable is
          the name is not known.
          '''
          if variable_name not in self._locals:
              raise UnknownVariable('Unknown variable %s' % variable_name)
          return self._locals[variable_namef get_local(self, variable_name):
          '''
          Return the value of the local variable. Raises UnknownVariable is
          the name is not known.
          '''
          if variable_name not in self._locals:
              raise UnknownVariable('Unknown variable %s' % variable_name)
          return self._locals[variable_name]
docs: Return the value of the local variable. Raises UnknownVariable is
          the name is not known.