find_element_by_name在Python中不起作用

Question

昨天昨天一切正常，但是今天我收到了这个错误：

追踪（最近一次通话）：文件“ bot.py”，第31行，在ig_bot = InstagramBot（'temp_username'，'temp_password'）文件“ bot.py”，第13行，位于[[initself.login（）文件“ bot.py”，第20行，登录self.driver.find_element_name（'username'）。send_keys（self.username）selenium.common.exceptions.NoSuchElementException：消息：没有这样的消息元素：无法找到元素：{“ method”：“ css选择器”，“选择器”：“。username”}（会话信息：chrome = 77.0.3865.90）

我试图通过类名xpath查找元素，但是这些都不起作用。

bot.py

from selenium import webdriver
import os
import time

class InstagramBot:

    def __init__(self, username, password):
        self.username = username
        self.password = password
        self.driver = webdriver.Chrome('chromedriver.exe')
        self.base_url = 'https://www.instagram.com'

        self.login()


    def login(self):

        self.driver.get('{}/accounts/login/?source=auth_switcher'.format(self.base_url))
        time.sleep(2)
        self.driver.find_element_by_name('username').send_keys(self.username)
        self.driver.find_element_by_name('password').send_keys(self.password)

        time.sleep(1)
        self.driver.find_elements_by_xpath("//div[contains(text(), 'Log In')]")[0].click()

    def nav_user(self, user):
        self.driver.get('{}/{}/'.format(self.base_url, user))

if __name__ == '__main__':

    ig_bot = InstagramBot('temp_username', 'temp_password')

    ig_bot.nav_user('garyvee')

html

<input class="_2hvTZ pexuQ zyHYP" aria-label="Phone number, username, or email" aria-required="true" autocapitalize="off" autocorrect="off" maxlength="75" name="username" type="text" value="">

Answer 1

我检查了页面，它确实起作用，您应该只使用find_element_by_name而不是find_element_by_class_name。

Chrome控制台的输出：

document.getElementsByName("username")[0];

<input class=​"_2hvTZ pexuQ zyHYP" aria-label=​"Phone number, username, or email" aria-required=​"true" autocapitalize=​"off" autocorrect=​"off" maxlength=​"75" name=​"username" type=​"text" value autocomplete=​"off" style=​"background-image:​ url("data:​image/​png;​base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAkCAYAAADo6zjiAAAAAXNSR0IArs4c6QAAAnVJREFUWAntVzuL4lAUPokBsVB0t9odK8VCLCal3Q4WbmUpCFv6DyymEmys9gf4B4RlS7GwEWQsBAsL195q2J3KWIiVrz0nJBcTk9yr3jCw7AG5j3PO9325j2OiAFq73X7Y7/​ffsft0Op0+05wsUxTlD2K9aJr23Gw2f7txFYv8FxJ/​dDtljlHICkU8ukWo9ORhk9ODEIe1yo7nUnH05JgJd3DBpcre8yD9Xly0Au9q/​7aAfD4PjUYDqPWzUFegUChAIpEAav0sVAF4901eu/​USEaoAL0L3nENANBqFbDYLqVTKHQe3+i6AXBOaPU4mk1Cv1yEej8PxeIR+vw/​z+dx03+qzsYNatgLFYtEkp2BVVaFUKrG8W30MIKDDBATEhOpiAqbTKWw2G5OMtmA0GjHiW30MIKCjtFqtk+2ng5ZOp8EwDFiv1/​a02Qb5HIGcAV7JNwwZW+8Hrw4BnFypbhRioAidbYFUdAEw/​Gf8QO8H7ybA0viF1QEB0cIhmUwGqtUqxGIxM2cymcBwOLzIx1X4JF0A1YxyuWzWkgtGjwlpAiKRCFQqFdB13YPGf0qagFqtBrlczmSiOkJGFZVnKl4Hem+/​26hYEfHhcIBerwe73U4IkyS+CEVygpbLJQwGA+h2u7BYLIC2RMSwFmjPeB+/​4om8+8NkNpsxzqCXEBaEHZW+VFDEIyb8kLUd5wS8vnkIrc+lb7xg8p/​/​d4jE82L4x5SHcKf/​v4CrCxEe1Deq4byVX61WrBBtt1vPcMK6WgAijfFX80Q8m+x0Omcj3+746jNAdQOVG76Qgg7CIKyrBeCVfcVEHQF+0hIK8rEwyqFcwiCsv+R847qxq2vXAAAAAElFTkSuQmCC")​;​ background-repeat:​ no-repeat;​ background-attachment:​ scroll;​ background-size:​ 16px 18px;​ background-position:​ 98% 50%;​">​