从一开始就使用Selenium和Python在连接超时时使用while循环 [英] Start from the beginning using while loop on connection times out using Selenium and Python

问题描述

from selenium import webdriver
import time

browser = webdriver.Chrome('C:/Users/acer/Desktop/chromedriver')
browser.get('website')

def user():
    while True:
        time.sleep(1)
        try:
            browser.find_element_by_id('q').send_keys('name') #Type in name
            browser.find_element_by_tag_name('button').click()  #Click "verify"

        finally:
            browser.find_element_by_tag_name('button').click()  #When connection times out, click "try again"
user()      #When connection times out again run "while loop" from the begining

当连接再次超时时，我想从头开始，并做一个永无止境的循环，直到连接成功.

I want to start from the beginning when the connection times out again and make a never ending loop until connection is successful.

推荐答案

您似乎很完美.为了演示当连接再次超时时从头开始，并进行永无止境的循环直到连接成功" ，这是一个小程序，执行以下操作:

Seems you were near perfect. To demonstrate "to start from the beginning when the connection times out again and make a never ending loop until connection is successful" here is a small program which does the following:

• 打开网址 https://www.google.com/
• 找出元素 By.NAME的"q"
• 清除字段
• 发送字符序列名称
• 尝试单击元素 find_element_by_tag_name('button')
• 失败并使用 continue 继续重试.

• 代码块:

• Opens the url https://www.google.com/
• Finds out the element By.NAME, "q"
• Clears the field
• Sends the character sequence name
• Attempts to click on the element find_element_by_tag_name('button')
• Fails and using continue keeps on retrying.

• Code Block:

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException, WebDriverException

options = webdriver.ChromeOptions() 
options.add_argument("start-maximized")
options.add_experimental_option("excludeSwitches", ["enable-automation"])
options.add_experimental_option('useAutomationExtension', False)
browser = webdriver.Chrome(options=options, executable_path=r'C:\WebDrivers\chromedriver.exe')
browser.get('https://www.google.com/')
def user():
    while True:
        print("Starting while loop")
        try:
            element = WebDriverWait(browser, 20).until(EC.element_to_be_clickable((By.NAME, "q")))
            element.clear() #clear the previous text
            element.send_keys('name') #Type in name
            browser.find_element_by_tag_name('button').click()
        except (WebDriverException, TimeoutException):
            print("Go to while loop from the begining")
            continue
user()

控制台输出:

Console Output:

Starting while loop
Go to while loop from the begining
Starting while loop
Go to while loop from the begining
Starting while loop
Go to while loop from the begining
.
.
.

您可以遵循类似的逻辑，并且您的有效代码块将是:

You can follow similar logic and your effective code block will be:

from selenium import webdriver
import time

browser = webdriver.Chrome('C:/Users/acer/Desktop/chromedriver')
browser.get('website')

def user():
    while True:
    time.sleep(1)
    try:
        browser.find_element_by_id('q').send_keys('name') #Type in name
        browser.find_element_by_tag_name('button').click()  #Click "verify"

    except WebDriverException:
        continue #When connection times out again run "while loop" from the begining
user()

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