比较两个文件

发布于 2024-11-05 12:41:57 字数 324 浏览 3 评论 0原文

我有两个这种格式的文件，

file1= filename val1 val2
file2= filename val3 val4

我想比较文件名，如果它们具有相同的名称，我想获得像这样的第三个文件 -

filename val1 val2 val3 val4

我从 file1 中选择一个文件名并遍历 file2 看看我是否得到它。然后寻找指向 file2 顶部的下一个文件名的指针..是否有更有效的方法来做到这一点？

原文

I have two files in this format

file1= filename val1 val2
file2= filename val3 val4

I want to compare filenames and if they have the same names , i want to get a third file like this-

filename val1 val2 val3 val4

I am picking a filename from file1 and going across file2 to see if i get it. Then seeking pointer back to the top of file2 for the next filename..is there a more efficient way of doing it?

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梦在夏天 2024-11-12 12:41:57

听起来您正在寻找的是标准 join 命令（不是 Python，而是标准 Unix shell 实用程序）。这是系统手册页的一个片段（似乎比 Linux 的手册页更详细）加入）：

        join phonedir names

        If the phonedir file contains the following names:

        Adams A.        555-6235
        Dickerson B.    555-1842
        Erwin G.        555-1234
        Jackson J.      555-0256
        Lewis B.        555-3237
        Norwood M.      555-5341
        Smartt D.       555-1540
        Wright M.       555-1234
        Xandy G.        555-5015

        and the names file contains these names and department numbers:

        Erwin           Dept. 389
        Frost           Dept. 217
        Nicholson       Dept. 311
        Norwood         Dept. 454
        Wright          Dept. 520
        Xandy           Dept. 999

        the join command displays:

        Erwin G.        555-1234        Dept. 389
        Norwood M.      555-5341        Dept. 454
        Wright M.       555-1234        Dept. 520
        Xandy G.        555-5015        Dept. 999

It sounds like what you're looking for is the standard join command (not Python, but a standard Unix shell utility). Here's a snip from the manual page on a system (that seems to have more detail than the Linux man page for join):

        join phonedir names

        If the phonedir file contains the following names:

        Adams A.        555-6235
        Dickerson B.    555-1842
        Erwin G.        555-1234
        Jackson J.      555-0256
        Lewis B.        555-3237
        Norwood M.      555-5341
        Smartt D.       555-1540
        Wright M.       555-1234
        Xandy G.        555-5015

        and the names file contains these names and department numbers:

        Erwin           Dept. 389
        Frost           Dept. 217
        Nicholson       Dept. 311
        Norwood         Dept. 454
        Wright          Dept. 520
        Xandy           Dept. 999

        the join command displays:

        Erwin G.        555-1234        Dept. 389
        Norwood M.      555-5341        Dept. 454
        Wright M.       555-1234        Dept. 520
        Xandy G.        555-5015        Dept. 999

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