Give user-agent as per installed chrome browser, and check for updated user-agent after every six months

latestUserAgent.py

from dateutil import relativedelta
from os import path
import json
import datetime

from selenium import webdriver
from webdriver_manager.chrome import ChromeDriverManager

def getUA():
    driver = webdriver.Chrome(ChromeDriverManager().install())
    ua = driver.execute_script("return navigator.userAgent;")
    driver.quit()
    return ua

def saveUA(ua):
    saveContent={}
    
    saveContent['ua'] = ua
    saveContent['atTime'] = str(datetime.datetime.now())
    
    with open('ua.json', 'w') as fp:
        json.dump(saveContent, fp)

def checkExistingUA():
    if path.exists("ua.json"):
        try:
            with open('ua.json') as f:
                saveContent = json.load(f)

                lastDate = datetime.datetime.strptime(saveContent['atTime'], '%Y-%m-%d %H:%M:%S.%f')
                rDelta = relativedelta.relativedelta(lastDate, datetime.datetime.now())

                if rDelta.years <= 0 and rDelta.months <= 6:
                    ua = saveContent['ua']
                    return True, ua
                else:
                    return False, None
        except:
            return False, None
    else:
        return False, None

def getLatestUA():
    flag, ua = checkExistingUA()
    if not flag:
        ua = getUA()
        saveUA(ua)
    return ua

if __name__ == '__main__':
    # Direct
    print (getLatestUA())
else:
    # Import
    ua = getLatestUA()