循环中的Python异常处理

Ryan Dooley 发表于 Dev

瑞安·杜利（Ryan Dooley）

当我的程序找不到要查找的元素时，发生异常，我想在CSV中记录事件，显示一条消息，指出发生错误并继续。我已成功将事件记录到CSV中并显示消息，然后程序跳出循环并停止。我如何指示python继续。请检查我的代码。

sites = ['TCF00670','TCF00671','TCF00672','TCF00674','TCF00675','TCF00676','TCF00677']`

with open('list4.csv','wb') as f:
    writer = csv.writer(f)
    try:
        for s in sites:
            adrs = "http://turnpikeshoes.com/shop/" + str(s)
            driver = webdriver.PhantomJS()
            driver.get(adrs)
            time.sleep(5)
            LongDsc = driver.find_element_by_class_name("productLongDescription").text
            print "Working.." + str(s)
            writer.writerows([[LongDsc]])
    except:
        writer.writerows(['Error'])
        print ("Error Logged..")
        pass

    driver.quit()
print "Complete."

埃利·科维戈（Eli Korvigo）

只需将try/except块放入循环中即可。并且pass在该except块的末尾不需要该语句。

with open('list4.csv','wb') as f:
    writer = csv.writer(f)
    for s in sites:
        try:
            adrs = "http://turnpikeshoes.com/shop/" + str(s)
            driver = webdriver.PhantomJS()
            driver.get(adrs)
            time.sleep(5)
            LongDsc = driver.find_element_by_class_name("productLongDescription").text
            print "Working.." + str(s)
            writer.writerows([[LongDsc]])
        except:
            writer.writerows(['Error'])
            print ("Error Logged..")

注意如果except没有特定的异常类，通常是不好的做法，例如，您应该这样做except Exception:...

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