From: Alex Corcoles Date: Fri, 28 Oct 2022 09:28:16 +0000 (+0200) Subject: Edit a bit for brevity X-Git-Tag: 20240214-emacs~561 X-Git-Url: https://xn--ix-yja.es/gitweb/?a=commitdiff_plain;h=fdc658901fab1a4e7534132ea8dc7d3f5ad5b552;p=alex.git Edit a bit for brevity --- diff --git a/programming/python/creating_nice_python_cli_tools.md b/programming/python/creating_nice_python_cli_tools.md index df3b812..e0071b2 100644 --- a/programming/python/creating_nice_python_cli_tools.md +++ b/programming/python/creating_nice_python_cli_tools.md @@ -25,10 +25,10 @@ Following this advice can make your tools easy to install by others, pleasant to Use it with a [ThreadPoolExecutor](https://docs.python.org/3/library/concurrent.futures.html#concurrent.futures.ThreadPoolExecutor) if the parallel tasks are IO-bound or invoke other programs, or with [ProcessPoolExecutor](https://docs.python.org/3/library/concurrent.futures.html#processpoolexecutor) if they perform significant CPU work in Python (to avoid the [GIL](https://wiki.python.org/moin/GlobalInterpreterLock)). * Consider using the standard [logging](https://docs.python.org/3/library/logging.html) module with a format that uses a timestamp, so users can inspect how much time is spent in different parts of the program. You can also use logging module to implement flags such as `--debug` and `--verbose`. -* Although you can use other fancier tools for parsing command-line arguments, the standard [argparse](https://docs.python.org/3/library/argparse.html) module is good enough for most tools. +* Although fancier tools exist, the standard [argparse](https://docs.python.org/3/library/argparse.html) module is good enough for most argument parsing. 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..." - Try to provide help texts for parameters that may not be obvious. - argparse supports a lot of different argument types, such as enumerated options, integers, file names, and others, that provide a lot of functionality out of the box. + Provide help text for non-obvious parameters. + argparse supports a lot of different argument types with a lot of functionality out of the box, such as enumerated options, integers, and file names. * 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.