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aliehuhu
V2EX  ›  Python

请问下列语句有错误么?用 python3

  •  
  •   aliehuhu · Sep 16, 2017 · 3886 views
    This topic created in 3156 days ago, the information mentioned may be changed or developed.
    #!/usr/bin/python
    import urllib.request
    import urllib.error

    try:
    response = urllib.request.urlopen('https://www.baidu.com',timeout=2)
    html = response.read().decode('utf-8')
    print(html)
    except urllib.error.HTTPError as e:
    print('error')
    13 replies    2017-09-16 23:09:05 +08:00
    chinesejar
        1
    chinesejar  
       Sep 16, 2017
    看似没有错误
    qsnow6
        2
    qsnow6  
       Sep 16, 2017
    没缩进
    aliehuhu
        3
    aliehuhu  
    OP
       Sep 16, 2017
    @qsnow6 复制的时候有缩进,发布的时候没有了
    GlobalNPC
        4
    GlobalNPC  
       Sep 16, 2017
    ```
    #!/usr/bin/python
    ```
    哪里用 python3 了?
    everfight
        5
    everfight  
       Sep 16, 2017
    试了下应该是 error 的类型错了

    #!/usr/bin/python
    import urllib.request
    import urllib.error

    try:
    response = urllib.request.urlopen('https://www.baidu.com',timeout=2)
    html = response.read().decode('utf-8')
    print(html)
    except:
    print('error')

    打印的结果如下:
    <html>
    <head>
    <script>
    location.replace(location.href.replace("https://","http://"));
    </script>
    </head>
    <body>
    <noscript><meta http-equiv="refresh" content="0;url=http://www.baidu.com/"></noscript>
    </body>
    </html>
    nitro123
        6
    nitro123  
       Sep 16, 2017 via Android
    @infun 有些发行版默认就是 3
    sunwei0325
        7
    sunwei0325  
       Sep 16, 2017
    #!/usr/bin/env python3
    Valyrian
        8
    Valyrian  
       Sep 16, 2017
    支持楼上,用 env
    huoru
        9
    huoru  
       Sep 16, 2017
    f
    huoru
        10
    huoru  
       Sep 16, 2017
    ```
    import urllib.request
    import urllib.error

    try:
    response = urllib.request.urlopen('https://www.baidu.com',timeout=2)
    html = response.read().decode('utf-8')
    print(html)
    except urllib.error.HTTPError as e:
    print('error')
    ```
    是没问题的。
    输出的 html 也正常
    wellsc
        11
    wellsc  
       Sep 16, 2017 via iPhone
    @infun 不算是错误,万一人家系统 python 默认版本就是 3 呢?
    julyclyde
        12
    julyclyde  
       Sep 16, 2017
    @wellsc 这个不合规。python3 的可执行文件不能叫 python,只能叫 python3
    wellsc
        13
    wellsc  
       Sep 16, 2017
    @julyclyde 求出处
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