Setting options from environment variables when using argparse

Question

I have a script which has certain options that can either be passed on the command line, or from environment variables. The CLI should take precedence if both are present, a

Answer 1

ConfigArgParse adds support for environment variables to argparse, so you can do things like:

p = configargparse.ArgParser()
p.add('-m', '--moo', help='Path of cow', env_var='MOO_PATH') 
options = p.parse_args()