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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 _post_document_batch(self, batch):
 """ Send a batch to Cloudsearch endpoint See: http://docs.aws.amazon.com/cloudsearch/latest/developerguide/submitting-doc-requests.html """
  # noqa
        target_batch = '/2013-01-01/documents/batch'
        url = self.endpoint_url + target_batch
        return requests.post(url, data=batch, headers={'Content-type': 'application/json'})