README.md

Dependencies

• python-selenium (can be install by doing pip install selenium)
• geckodriver

Usage

usage: codeforces-register.py [-h] [-e EMAIL] [-p PASSWORD] [-a] contest_id

positional arguments:
  contest_id            Id of contest

optional arguments:
  -h, --help            show this help message and exit
  -e EMAIL, ---email EMAIL
                        email address of codeforces account
  -p PASSWORD, --password PASSWORD
                        password of codeforces account
  -a, --agree           automatically agree to contest terms

if email and password are not provided they are prompted in the commandline

Examples

$ python codeforces-register.py 1272
$ python codeforces-register.py -a 1272
$ python codeforces-register.py -e mukundan314@gmail.com 1272
$ python codeforces-register.py -e mukundan314@gmail.com -p password 1272

codeforces-register.py

import argparse
import getpass
import sys
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException


def main(argv):
    parser = argparse.ArgumentParser()
    parser.add_argument("contest_id", type=int, help="Id of contest")
    parser.add_argument("-e", "---email", type=str, help="email address of codeforces account")
    parser.add_argument("-p", "--password", type=str, help="password of codeforces account")
    parser.add_argument("-a", "--agree", action="store_true", help="automatically agree to contest terms")

    args = parser.parse_args(argv[1:])

    if (args.password is not None) and (args.email is None):
        print("password provided but email not provided", file=sys.stderr)
        exit(1)

    email = args.email
    if email is None:
        email = input("Email: ")

    password = args.password
    if password is None:
        password = getpass.getpass()

    browser = webdriver.Firefox()
    wait = webdriver.support.wait.WebDriverWait(browser, 5)

    browser.get("https://codeforces.com/contestRegistration/{}".format(args.contest_id))

    browser.find_element_by_name("handleOrEmail").send_keys(email)
    browser.find_element_by_name("password").send_keys(password)

    browser.find_element_by_class_name("submit").click()

    wait.until(lambda driver: driver.current_url.startswith("https://codeforces.com/contestRegistration"))

    if args.agree:
        browser.find_element_by_class_name("submit").click()


if __name__ == "__main__":
    main(sys.argv)