selenium.py

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

# Tell Selenium where you installed the chromedriver!
chromedriver_path = 'C:/Users/User/Downloads/chromedriver_win32/chromedriver.exe' 
webdriver = webdriver.Chrome(executable_path=chromedriver_path)

# Getting the website through the webdriver
webdriver.get('https://www.somewebsite.com/accounts/login/?source=auth_switcher')

username = webdriver.find_element_by_name('username') # Similar to how BS works
username.send_keys('your_username')
password = webdriver.find_element_by_name('password')
password.send_keys('your_password')

button_login = webdriver.find_element_by_css_selector('button')
button_login.click() # Sending a click command to login