我正在尝试通过python和selenium自动登录一些网页（Firefox）。当我在函数之外尝试我的代码时，它工作正常，但如果我在函数中调用它，它会说
jsm：192：5没有这样的元素错误@chrome：//remote/content/shared/webdriver/错误。jsm：404：5元素。查找/〈/〈@chrome：//remote/content/marionette/元素。js：291：16
代码本身如下所示

from selenium import webdriver from time import sleep from getpass import getpass from subprocess import Popen, PIPE from selenium.webdriver.common.by import By

webpages = dict(zip(['name','name2', 'name3'],['webpage','weboage2', 'werbpage3'])) usr='user@gmail.com'

def getuserbox(name): 
    if webpage == 'name': 
        foundelement = driver.find_element(By.ID,"mat-input-0") 
    if webpage == 'name2': 
        foundelement =  driver.find_element(By.NAME, 'userId') 
    else: 
        foundelement = driver.find_element(By.NAME,'userid') return foundelement

def getpwdbox(webpage): 
    if webpage == 'name': 
        foundelement = driver.find_element(By.ID,"mat-input-1") 
    elif webpage == 'name2': 
        foundelement =  driver.find_element(By.NAME,'password') 
    else: 
        foundelement = driver.find_element(By.ID,'password') return foundelement

for name, page in webpages.items(): 
    driver = webdriver.Firefox() 
    driver.get(page) 
    print ("Opened page "+name+'/n'+page) sleep(2)

    username_box = getuserbox(name) 
    print('found box and trying to send usr') 
    sleep(1) 
    username_box.send_keys(usr) 
    print ("Email Id entered") 
    sleep(1)

    password_box = getpwdbox(name) 
    password_box.send_keys(pwd)

以将用户数据放入页面。如果在函数外部完成，则可以工作。