循环中的 Python 异常处理

Question

当我的程序找不到它要查找的元素时会发生异常，我想在 CSV 中记录事件，显示发生错误的消息并继续。 我已成功将事件记录在 CSV 中并显示消息，然后我的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."

Answer 1

只需将try/except块放入循环中即可。 并且不需要在except块末尾的pass语句中。

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..")

注意在没有特定异常类的情况下使用except通常是一种不好的做法，例如，您应该使用except Exception:...