IF 语句表现相反

Question

我写了一个小脚本来扫描以下格式的文本文件。

然后输出带有重定向 URL 的不同文本文件，前提是存在重定向。否则，我想打印出 "No redirection"。但出于某种原因，恰恰相反。

下面是我的代码，你能解释一下我做错了什么吗？

import urllib.request

inc_input = input("Please enter the file name\n")
file_name = open(inc_input)
f = open('output.txt', 'w')
for line in file_name:
    eachurl = line.strip()
    redirected = urllib.request.urlopen(eachurl)
    finalurl = redirected.geturl()

    if eachurl == finalurl:
        f.write(eachurl + "\t" + finalurl + "\n")
    else:
        f.write(eachurl + "\t" + "No redirection" + "\n")
f.close()

Answer 1

if eachurl != finalurl:  #when the urls are not same, it's a redirection
    f.write(eachurl + "\t" + finalurl + "\n")
else:
    f.write(eachurl + "\t" + "No redirection" + "\n")

Answer 2

您的逻辑似乎与您的预期相反，我添加了注释以澄清：

if eachurl == finalurl:
    # no redirection happened since we're in the original url (==)
    f.write(eachurl + "\t" + finalurl + "\n")
else:
    # redirection happened, different url
    f.write(eachurl + "\t" + "No redirection" + "\n")

使用not反转条件或反转物体。目前该消息具有误导性。

IF 语句表现相反

IF statement behaving the opposite way

python

python-3.x

urllib