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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 _get_required_param(self, param_name):
 """Get a required request parameter. Args: param_name: name of request parameter to fetch. Returns: parameter value Raises: errors.NotEnoughArgumentsError: if parameter is not specified. """

    value = self.request.get(param_name)
    if not value:
      raise errors.NotEnoughArgumentsError(param_name + " not specified")
    return value