background I have a script where I am using parseargs to partially parse the input.
parser = argparse.ArgumentParser()
parser.add_argument("-c", action="store_true")
nspc = parser.parse_known_args()
The reason for using parseargs is to allow the -c option to occur anywhere in the input. I only want to parse this option, and then later in the code I do additional parsing on my own. The reason for this is, the script accepts a large number of arguments from a configuration file, ie, myscript.py doesn't know the arguments until runtime.
problem The problem I am running into is, some of the arguments may start with the letter "c.", so if I say
$ myscript.py "some argument" -cdef
I get the error
myscript.py: error: argument -c: ignored explicit argument 'ef'
Since I said parser.add_argument("-c", ... I would expect that -c would be parsed but -cdef would not. Obviously, -c is an optional argument.
How can I tell the parser that -c is an option but -cdef is not?
Use -- for multi-character argument names.
It's fairly common in UNIX for -cdef to mean -c -d -e -f, whereas --cdef is a single option. argparse follows this convention.
(As an example: ls -la is the equivalent of ls -l -a, whereas ls --color is just a single option.)
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