[Python]: how to print results on a output file instead of the URL

Question

The code is printing results to the a URL:

    result = test2
    try:
        resultData = {'l': result}
        r = requests.post('http://site.com/a.php', data = resultData)
    except:
        pass
    self.testingWP(test2, session, ret)
    return ret

Instead of printing results on the URL, I would like to get the results in > output.txt

Thanks