How can I pass a list as a command line argument with argparse
13 Answers Sorted by 1558 SHORT ANSWER Use the nargs option or the append setting of the action option depending on how you want the user interface to behave nargs parser add argument l list nargs help Required Set flag required True Use like python arg py l 1234 2345 3456 4567
How to pass and parse a list of strings from command line with argparse , 3 Answers Sorted by 92 You need to define names list to take an arbitrary number of arguments parser add argument n names list nargs default Note that options with arbitrary number of arguments don t typically play well with positional arguments though
Python argparse default value or specified value Stack Overflow
Const 1 sets the default when there are 0 arguments type int converts the argument to int If you want test py to set example to 1 even if no example is specified then include default 1 That is with parser add argument example nargs const 1 type int default 1 then test py Namespace example 1 Share Follow
Python argparse choices with a default choice Stack Overflow, Argparse Share Follow edited Nov 13 2017 at 16 03 Community Bot 1 1 asked Oct 29 2016 at 22 35 MVanOrder 1 321 1 10 20 6 Don t pass list at all and your default will be used ShadowRanger Oct 29 2016 at 22 40 I see That d work except for the fact that I need to tell it to list create delete etc MVanOrder Oct 29 2016 at 22 43 4
Python argparse default argument stored as string not list
Python argparse default argument stored as string not list, 19 I cannot figure out this behaviour of argparse from the documentation import argparse parser add argument host metavar dest host nargs 1 default localhost help Name of host for database Default is localhost args parser parse args print args Here is the output with and without an argument for host
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Build Command Line Interfaces With Python s argparse
Build Command Line Interfaces With Python s argparse In Python you can create full featured CLIs with the argparse module from the standard library In this article you ll learn how to Get started with command line interfaces Organize and lay out a command line app project in Python Create command line interfaces with Python s argparse
Python Argparse And Command Line Arguments Python Tutorials YouTube
Default mode defmode property regulates how argparse should use the default value of an element By default or if defmode contains u for unused the default value will be automatically passed to the element if it was not invoked at all It will be passed minimal required of times so that if the element is allowed to consume no arguments e g using args Default values argparse 0 7 1 tutorial Read the Docs. 15 4 argparse Parser for command line options arguments and sub commands New in version 2 7 The argparse module makes it easy to write user friendly command line interfaces The program defines what arguments it requires and argparse will figure out how to parse those out of sys argv The argparse module also automatically generates help and usage messages and issues errors when Python s argparse standard library module is a tool that helps you write command line interfaces CLI over your Python code
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