用 configparser 更新配置项的时候怎么保留注释啊? - V2EX
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fmdxx1991
V2EX    Python

用 configparser 更新配置项的时候怎么保留注释啊?

  •  
  •   fmdxx1991 2021-05-27 08:06:24 +08:00 2520 次点击
    这是一个创建于 1674 天前的主题,其中的信息可能已经有所发展或是发生改变。
    一写入配置文件里的注释就全没了,影响可读性,百度了下,看解决办法要修改模块源码,有没有更好的办法啊?
    5 条回复    2021-05-27 15:35:26 +08:00
    Vinty
        1
    Vinty  
       2021-05-27 09:07:05 +08:00
    很简单,修改前缀不要把它标记为注释读取就行

    ```
    config.ini
    [default_settings]
    ; comment
    value = 1
    ```

    ```python
    from configparser import ConfigParser
    cOnf= ConfigParser(comment_prefixes='/', allow_no_value=True)
    conf.read("config.ini")
    with open("new_config.ini", "w") as fp:
    conf.write(fp)
    ```
    fmdxx1991
        2
    fmdxx1991  
    OP
       2021-05-27 10:28:59 +08:00
    @Vinty 有点问题哎,
    ```
    config.ini
    [default_settings]
    ; comment
    ;value = 1
    #value=2
    value=3
    ```
    注释是这个样子的,然后就报错了=。。=( option ';value' in section 'default_settings' already exists ),配置文件开头也有注释,运行的话也是直接报错
    fmdxx1991
        3
    fmdxx1991  
    OP
       2021-05-27 10:44:54 +08:00
    @fmdxx1991
    [default_settings]
    ; comment
    #value = 1
    #value = 2
    value=3
    这样的,前面写错了
    xingheng
        4
    xingheng  
       2021-05-27 13:02:11 +08:00
    换 yaml
    Vinty
        5
    Vinty  
       2021-05-27 15:35:26 +08:00
    #2 因为 read 的时候就已经丢掉了注释,所以为了保存注释,这里把注释的前缀修改成了另一个字符`\`,然后把注释当作一条字段读取了进来,
    你这里#value = 1, #value = 2 就是一个重复的字段了
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