Make a command-line interface from a function.
Project description
Produce a command-line interface from a Python function.
Consider the following Python program, called do_something.py.
#!/usr/bin/env python
def main(input_file, output_file, n_cores:int = 3):
'''
Do something to a file with several cores.
'''
# Pretend that something happens here.
horetu(main)
Run it with the help flag; this is the result.
$ do_something.py --help
usage: do_something.py [-h] [--n-cores N-CORES]
input-file output-file
Do something to a file with several cores.
Here’s a more complicated example.
#!/usr/bin/env python
# ...
def main():
commands = {
'scrape': scrape,
'serve': server.main,
'set-password': set_password,
'save-hucs': scraper.save_hucs,
}
description = 'Catalog and process public notices for Section 404 permit applications.'
horetu(commands, name = 'scott', description = description)
Then we can run it like this.
$ scott -h
usage: scott [-h] {serve,set-password,scrape,save-hucs} ...
Catalog and process public notices for Section 404 permit applications.
positional arguments:
{serve,set-password,scrape,save-hucs}
optional arguments:
-h, --help show this help message and exit
You can have nested subcommands too.
f = g = h = i = j = lambda x: int(x) + 4
commands = {
'subcommand1': {
'subsubcommand1.1': f,
'subsubcommand1.2': g,
},
'subcommand2': h,
'subcommand3': {
'subsubcommand3.1': i,
'subsubcommand3.2': {
'subsubsubcommand3.2.1': j,
}
},
}
horetu(commands)
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