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Diffstat (limited to 'programming/python')
| -rw-r--r-- | programming/python/creating_nice_python_cli_tools.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/programming/python/creating_nice_python_cli_tools.md b/programming/python/creating_nice_python_cli_tools.md index d57eb0eb..6f466389 100644 --- a/programming/python/creating_nice_python_cli_tools.md +++ b/programming/python/creating_nice_python_cli_tools.md @@ -24,5 +24,10 @@ It has decent support for [sub-commands](https://docs.python.org/3/library/argparse.html#sub-commands), and the linked document describes a very nice pattern to define functions for sub-commands, under "One particularly effective way of handling sub-commands..." * Remember that the standard [json](https://docs.python.org/3/library/json.html) module is built-in. You can use it to add a mode to your tool that generates JSON output instead of human-readable output, for easy automation of your tool, maybe using [jq](https://stedolan.github.io/jq/) or [fx](https://github.com/antonmedv/fx). +* Use the standard [subprocess](https://docs.python.org/3/library/subprocess.html) module to execute other commands. + * Remember never to use `shell=True`, so among other things, your tool will work correctly with files using spaces in their names. + * Use `check=True` so if the subprocess fails, an exception will be raised. + This is likely the best default behavior, although the error is a bit ugly, this normally prevents ugly problems and it's a safe option. + You can find examples for many of those techniques in my [repos](https://github.com/alexpdp7?tab=repositories&q=&type=&language=python&sort=). |