argparse

argparse action or type for comma-separated list

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The simplest solution is to consider your argument as a string and split. #!/usr/bin/env python3 import argparse parser = argparse.ArgumentParser() parser.add_argument(“–myarg”, type=str) args = parser.parse_args() if args.myarg is not None: args.myarg = [s.strip() for s in args.myarg.split(“,”)] print(args) Result: $ ./toto.py –myarg=abcd,e,fg Namespace(myarg=[‘abcd’, ‘e’, ‘fg’]) $ ./toto.py –myarg=”abcd, e, fg” Namespace(myarg=[‘abcd’, ‘e’, ‘fg’])

Python: argparse optional arguments without dashes

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There is no way to get argparse to do this for you. However, you can make argparse accept any number of positional arguments: parser.add_argument(‘FILES’,nargs=”*”) options=parser.parse_args() file1,optional_files=options.FILES[0],options.FILES[1:] Of course, you may want to add some checks to make sure that at least 1 file was given, etc. EDIT I’m still not 100% sure what you want … Read more

Python argparse fails to parse hex formatting to int type

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argparse is looking to create a callable type conversion from the ‘type’ value: def _get_value(self, action, arg_string): type_func = self._registry_get(‘type’, action.type, action.type) if not _callable(type_func): msg = _(‘%r is not callable’) raise ArgumentError(action, msg % type_func) # convert the value to the appropriate type try: result = type_func(arg_string) # ArgumentTypeErrors indicate errors except ArgumentTypeError: name … Read more

how to set logging level from command line

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The basicConfig function can take a string argument for level, and it will check its validity for you, so the code can be much simpler than BarryPye’s answer. import argparse import logging parser = argparse.ArgumentParser() parser.add_argument( ‘-log’, ‘–loglevel’, default=”warning”, help=’Provide logging level. Example –loglevel debug, default=warning’ ) args = parser.parse_args() logging.basicConfig( level=args.loglevel.upper() ) logging.info( ‘Logging … Read more

Python argparse integer condition (>=12) [duplicate]

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One way is to use a custom type. def bandwidth_type(x): x = int(x) if x < 12: raise argparse.ArgumentTypeError(“Minimum bandwidth is 12”) return x parser.add_argument(“-b”, “–bandwidth”, type=bandwidth_type, help=”target bandwidth >= 12″) Note: I think ArgumentTypeError is a more correct exception to raise than ArgumentError. However, ArgumentTypeError is not documented as a public class by argparse, … Read more

Python argparse – Mutually exclusive group with default if no argument is given

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You could have each of your actions update the same variable, supplying stdout as the default value for that variable. Consider this program: import argparse parser = argparse.ArgumentParser() group = parser.add_mutually_exclusive_group() group.add_argument( ‘-s’, ‘–stdout’, action=’store_const’, dest=”type”, const=”s”, default=”s”) group.add_argument( ‘-c’, ‘–csv’, action=’store_const’, dest=”type”, const=”c”) group.add_argument( ‘-t’, ‘–txt’, action=’store_const’, dest=”type”, const=”t”) args = parser.parse_args() print args … Read more

Python argparse regex

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The type keyword argument can take any callable that accepts a single string argument and returns the converted value. If the callable raises argparse.ArgumentTypeError, TypeError, or ValueError, the exception is caught and a nicely formatted error message is displayed. import argparse import re from uuid import uuid4 def my_regex_type(arg_value, pat=re.compile(r”^[a-f0-9A-F]{32}$”)): if not pat.match(arg_value): raise argparse.ArgumentTypeError(“invalid … Read more

Disable/Remove argument in argparse

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Is it possible to remove or disable an argument in argparse, such that it does not show in the help? Set help to argparse.SUPPRESS when you add the argument, like this: parser.add_argument(‘–arg1’, help=argparse.SUPPRESS) This will prevent the argument from showing up in the default help output.

Multiple lines in python argparse help display

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The default help formatter re-wraps lines to fit your terminal (it looks at the COLUMNS environment variable to determine the output width, defaulting to 80 characters total). From the formatter_class section: By default, ArgumentParser objects line-wrap the description and epilog texts in command-line help messages. Use the RawTextHelpFormatter class instead to indicate that you already … Read more

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