code: def set_environment_variable(self, name, value):
          
          m = Message()
          m.add_byte(cMSG_CHANNEL_REQUEST)
          m.add_int(self.remote_chanid)
          m.add_string("env")
          m.add_boolean(False)
          m.add_string(name)
          m.add_string(value)
          self.transport._send_user_message(m)
docs: Set the value of an environment variable.
  
          .. warning::
              The server may reject this request depending on its ``AcceptEnv``
              setting; such rejections will fail silently (which is common client
              practice for this particular request type). Make sure you
              understand your server's configuration before using!
  
          :param str name: name of the environment variable
          :param str value: value of the environment variable
  
          :raises:
              `.SSHException` -- if the request was rejected or the channel was
              closed