python - 如何将 UNIX 查找输出作为 Python 脚本的参数传递？

Question

我有一个可以使用 UNIX 'find' 命令获取的文件列表，例如：

$ find . -name "*.txt"
foo/foo.txt
bar/bar.txt

如何将此输出传递到 hello.py 之类的 Python 脚本中，以便使用 Python 的 argparse 库对其进行解析？

谢谢！

Answer 1

使用xargs：

find . -name "*.txt" | xargs python -c 'import sys; print sys.argv[1:]'

Answer 2

如果您只想要 的文本输出find(1)，请使用管道：

~$ find . -name "*.txt" | python hello.py

如果您希望将文件列表作为参数传递给脚本，请使用xargs(1)：

~$ find . -name "*.txt" -print0 | xargs -0 python hello.py

或-exec使用find(1).

Answer 3

来自man find：

-exec command ;
      Execute  command;  true  if 0 status is returned.  All following
      arguments to find are taken to be arguments to the command until
      an  argument  consisting of `;' is encountered.  The string `{}'
      is replaced by the current file name being processed  everywhere
      it occurs in the arguments to the command, not just in arguments
      where it is alone, as in some versions of find.  Both  of  these
      constructions might need to be escaped (with a `\') or quoted to
      protect them from expansion by the shell.  See the EXAMPLES sec‐
      tion for examples of the use of the -exec option.  The specified
      command is run once for each matched file.  The command is  exe‐
      cuted  in  the starting directory.   There are unavoidable secu‐
      rity problems surrounding use of the -exec  action;  you  should
      use the -execdir option instead.

-exec command {} +
      This  variant  of the -exec action runs the specified command on
      the selected files, but the command line is built  by  appending
      each  selected file name at the end; the total number of invoca‐
      tions of the command will  be  much  less  than  the  number  of
      matched  files.   The command line is built in much the same way
      that xargs builds its command lines.  Only one instance of  `{}'
      is  allowed  within the command.  The command is executed in the
      starting directory.

所以你可以做

 find . -name "*.txt" -exec python myscript.py {} +

Answer 4

如果您需要在 find 输出的参数列表之后传递参数，这会有所帮助：

$ python hello.py `find . -name "*.txt"`

我用它将pdf文件连接到另一个文件中：

$ pdfunite `find . -name "*.pdf" | sort` all.pdf