parameters: (self, response=None)
docstring: Sleep between retry attempts.
  
          This method will respect a server's ``Retry-After`` response header
          and sleep the duration of the time requested. If that is not present, it
          will use an exponential backoff. By default, the backoff factor is 0 and
          this method will return immediately.
docstring_summary: Sleep between retry attempts.
docstring_tokens: Sleep between retry attempts .
function: def sleep(self, response=None):
          """ Sleep between retry attempts.
  
          This method will respect a server's ``Retry-After`` response header
          and sleep the duration of the time requested. If that is not present, it
          will use an exponential backoff. By default, the backoff factor is 0 and
          this method will return immediately.
          """
  
          if self.respect_retry_after_header and response:
              slept = self.sleep_for_retry(response)
              if slept:
                  return
  
          self._sleep_backoff()
function_tokens: def sleep ( self , response = None ) : if self . respect_retry_after_header and response : slept = self . sleep_for_retry ( response ) if slept : return self . _sleep_backoff ( )