Pass argument to unit test method in python

I am trying to access clientId and csv inside method but it is not accessible.

import argparse
import csv
import re
import sys
import unittest

from selenium import webdriver
from selenium.webdriver.common.keys import Keys

ABC_CDN_URL = 'http[s]?://xyz.abc.com/%s/tracker.js$'

class Abc(unittest.TestCase):

    def setUp(self):
        self.driver = webdriver.Firefox()
        self.chuknuURLRegex = re.compile(ABC_CDN_URL % (17420))

    def checkForAbc(self, nargs):
        driver = self.driver
        with open('/home/Downloads/Website_Url.csv', 'rb') as f:
            reader = csv.reader(f)
            index = 0
            for url in reader:
                if index == 0:
                    index += 1
                    continue
                driver.get(url[0])
                driver.implicitly_wait(10) # seconds
                elems = driver.find_elements_by_tag_name('script')
                isPresent = False;
                for elem in elems:
                    elemSrc = elem.get_attribute('src')
                    if self.chuknuURLRegex.match(elemSrc): 
                        isPresent = True;
                        print url[0], "pass"
                        break
                if isPresent == False:
                    print url[0], 'fail'

    def tearDown(self):
        self.driver.close()

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('--clientId', default='')
    parser.add_argument('--csv', default='')
    parser.add_argument('unittest_args', nargs='*')
    args = parser.parse_args()
    sys.argv[1:] = args.unittest_args
    unittest.main()

python Abc.py Abc.checkForAbc --clientId=0 --csv=990

How do I access clientId and csv argument inside my checkForAbc method while executing unit test