Python Closing Existing Positions Help

Hello, Sorry if I'm bothering anyone because I open New Threads these days.

I am using Twisted ,  pyhton ctrader.fix

I can open LONG or SHORT postions. 

but when I try to close those existing positions, I  have troubles.

thanks to a member named ctid1980098 tried to help me explained the logic, 

but I am a beginner and my attempts fail...

First, I try to  position IDs like this ,

class CustomRequestForPositions(RequestForPositions):
    def __init__(self, config):
        super().__init__(config)
        self.PosReqID = generate_unique_id()

position_request = CustomRequestForPositions(config)
       position_request.PosReqID = generate_unique_id()
       position_request.Symbol = ticker

       response_message = yield client.send(position_request)

After I try to extract the numbers next to 721= 123456   from the received RequestForPositions Message.
721 PosMaintRptID  is POSITION ID
 

def extract_position_ids(message):
    matches = re.findall(r'721=[0-9]+', message)
    position_ids = [match[4:] for match in matches]
    print("721 NUMBER:", position_ids)
    return position_ids

After I try to make opposite market orders with the same ID . which has extracted from the previous step.

as I told you I am a beginner . I may be completely wrong. I may not be able to do extraction properly.

I would be very hapy if someone share with me a python code
to close the existing positions ... (with position request and extraction included.) Therefore I can try it to apply 
to my existing code and try more... ...