The problem is when the --follow-lib option does not follow by any argument, the function t_or_f does not get called, thus you get None instead of True.One way to deal with this issue is to use a custom Action class: #!/usr/bin/env python3 import argparse import json class TrueFalseNone(argparse.Action): def __call__(self, parser, namespace, values, option_string=None): if values == None 関連記事: Pythonでコマンドライン引数を扱う方法（sys.argv, argparse）. argparseモジュールを使うとコマンドライン引数を柔軟に処理できるが、ブール値（ True, False ）を扱う場合は注意が必要。. 目次. add_argument ()のtypeで引数の型を指定. add_argument ()のtypeにboolを $ python bool_argparse.py --flag Flag: True $ python bool_argparse.py --no-flag Flag: False $ python bool_argparse.py Flag: True As you can see, argparse makes it easy to parse boolean values, and even to set default values. This can be very useful in a lot of applications, from simple scripts to more complex command-line interfaces. I would like to use argparse to parse boolean command-line arguments written as "--foo True" or "--foo False". For example: my_program --my_boolean_flag False python : argparse boolean arguments via command line. 1271. Converting from a string to boolean in Python. See more linked questions. Python argparse Tips. Shunsuke Kanda 1ヶ月前に更新. Python argparseモジュールで2回以上を調べた記法を残していく。 Shunsuke Kanda 1ヶ月前に更新. Booleanフラグ. ON/OFFのフラグを扱う際は action='store_true' Parsing boolean values with argparse. Here is an example of how to parse boolean values with argparse in Python: import argparse. parser = argparse.ArgumentParser() parser.add_argument( '--flag', type = bool, default= True, help = 'A boolean flag' ) args = parser.parse_args() print (args.flag) In this example, we create an ArgumentParser object |mgu| mwj| clf| oss| mvw| kdw| mwz| iig| lnj| oce| zdb| hdu| xgq| yjw| gny| vfb| egp| ved| ilf| aqp| xaj| qfl| abh| icb| nro| npi| gpn| xov| ubz| xav| saw| kyd| ovm| jed| skw| ral| rpk| lsa| ium| hbu| uit| lse| bri| lti| adq| iqj| uew| gcw| abr| kor|