问我已经导入了Selenium，我以为它是随Python一起安装的，我找不到哪里出了问题

EN

from selenium import webdriver #This is where the error 
from getpass import getpass

usr = input("enter your username or email id: ")
pwd = getpass("Enter your password: ")

driver = webdriver.Chrome()
driver.get('https://www.facebook.com/')

username_box = driver.find_element_by_id('email')
username_box.send_keys(usr)

password_box = driver.find_element_by_id('pass')
password_box.send_keys(pwd)

login_btn = driver.find_element_by_id('u_0_2')
login_btn.submit()

Traceback (most recent call last):
  File "C:\Users\jarre\OneDrive\Documents\FB automation.py", line 1, in <module>
    from selenium import webdriver
ModuleNotFoundError: No module named 'selenium'"