code: def create_request(self, method='', url='', query_params=None, body=None, headers=None):
          
  
          if query_params:
              query = urlencode(query_params)
              if query:
                  url = url + ('&' if url.find('?') > 0 else '?') + query
  
          content_type = None
          accept = None
  
          if headers is None:
              headers = {}
  
          it = iterator(headers)
  
          for key, value in it:
              if key.lower().find('content-type') >= 0:
                  content_type = value
              if key.lower().find('accept') >= 0:
                  accept = value
  
          if content_type is None:
              content_type = 'application/json'
              headers['Content-Type'] = content_type
  
          if accept is None:
              accept = 'application/json'
              headers['Accept'] = accept
  
          if content_type.lower().find('application/json') >= 0:
              body = json.dumps(body) if body else None
          elif content_type.lower().find('application/x-www-form-urlencoded') >= 0:
              body = urlencode(body) if body else None
  
          return requests.Request(method, url, headers=headers, data=body)
docs: :param method:
          :param url:
          :param query_params:
          :param body:
          :param headers:
          :return:requests.Request