<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reset(self):
 """ Reset all attributes which could be modified during previous request or which is not initialized yet if this is the new Grab instance. This methods is automatically called before each network request. """


        self.request_head = None
        #self.request_log = None
        self.request_body = None
        self.request_method = None
        self.request_counter = None
        self.exception = None
        if self.transport:
            self.transport.reset()