如果 xpath 在 Python 中找不到 xpath，则删除行

Question

我正在使用一个使用 selenium 的 python 脚本来检查 url 列表并在那里执行操作。

现在我想，如果找不到 xpath，它会从我的 txt 文件中删除该特定行。我该怎么做？

这是我的代码

def post(status):
        with open("fbgroepen.txt") as listOfGroups:
            for group in listOfGroups:
                driver.get(group)
                time.sleep(5)
                try:
                    if status:
                        #try posting
                        try:
                            postClick = WebDriverWait(driver, 20).until(
                            EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[3]/div/div/div[1]/div[1]/div[4]/div/div/div/div/div[1]/div[1]/div/div/div/div[1]/div/div[1]/span"))).click()
                            #typ bericht
                            post_box = WebDriverWait(driver, 20).until(
                            EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[4]/div/div/div[1]/div/div[2]/div/div/div/div/div[1]/form/div/div[1]/div/div/div[1]/div/div[2]/div[1]/div[1]/div[1]/div/div/div/div/div[2]/div/div/div/div"))).send_keys(message)
                            #click op post
                            post_element = WebDriverWait(driver, 20).until(
                            EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[4]/div/div/div[1]/div/div[2]/div/div/div/div/div[1]/form/div/div[1]/div/div/div[1]/div/div[3]/div[2]/div/div/div"))).click()
                            time.sleep(2)
                            #wacht tot gepost
                            WebDriverWait(driver, 20).until(
                            EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[3]/div/div/div[1]/div[1]/div[4]/div/div/div/div/div[1]/div[1]/div/div/div/div[1]/div/div[1]/span")))

                        #continue to next url if xpath is'nt found
                        except:
                            continue
                    else:
                        continue
                except selenium.common.exceptions.NoSuchElementException:
                    continue 

提前致谢

Answer 1

不确定是否正确理解，但如果您假设：

#continue to next url if xpath is'nt found
except:
    continue

这部分捕获表示未找到 xpath 的情况的异常（imo 异常太宽泛，但现在让我们离开它）您可以打开另一个文件，例如

open("fbgroepen.tmp")

并将找到的每一行以及脚本末尾的内容写入它：

import shutil

def post（状态）：

tmp_file = open("fbgroepen.tmp", "w")

with open("fbgroepen.txt") as listOfGroups:
    for group in listOfGroups:
        driver.get(group)
        time.sleep(5)
        try:
            if status:
                #try posting
                try:
                    postClick = WebDriverWait(driver, 20).until(
                    EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[3]/div/div/div[1]/div[1]/div[4]/div/div/div/div/div[1]/div[1]/div/div/div/div[1]/div/div[1]/span"))).click()
                    #typ bericht
                    post_box = WebDriverWait(driver, 20).until(
                    EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[4]/div/div/div[1]/div/div[2]/div/div/div/div/div[1]/form/div/div[1]/div/div/div[1]/div/div[2]/div[1]/div[1]/div[1]/div/div/div/div/div[2]/div/div/div/div"))).send_keys(message)
                    #click op post
                    post_element = WebDriverWait(driver, 20).until(
                    EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[4]/div/div/div[1]/div/div[2]/div/div/div/div/div[1]/form/div/div[1]/div/div/div[1]/div/div[3]/div[2]/div/div/div"))).click()
                    time.sleep(2)
                    #wacht tot gepost
                    WebDriverWait(driver, 20).until(
                    EC.element_to_be_clickable((By.XPATH, "/html/body/div[1]/div/div[1]/div/div[3]/div/div/div[1]/div[1]/div[4]/div/div/div/div/div[1]/div[1]/div/div/div/div[1]/div/div[1]/span")))
                    
                    tmp_file.write(group)
                    
                #continue to next url if xpath is'nt found
                except:
                    continue
            else:
                continue
        except selenium.common.exceptions.NoSuchElementException:
            continue 
            
tmp_file.close()
shutil.copyfile("fbgroepen.tmp", "fbgroepen.txt")