如果在 Python 中找不到 xpath，则删除行

Question

我使用的是一个使用selenium的python脚本，该脚本检查URL列表并在其中执行操作。

现在我希望如果找不到xpath，它会从我的txt文件中删除特定的行。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 

提前感谢

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

这一部分捕获表示找不到xpath的情况的异常(imo异常范围太广，但暂时保留(您可以打开另一个文件，例如

open("fbgroepen.tmp")

然后把找到的每一行都写进去，在脚本的末尾写这样的东西：

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")