python argparse list of strings comma separated

Namespace object. To use this feature from your python code, you need to create a Predictor instance that can serialize your input data to CSV format: FileType objects as their type will open command-line arguments as I find your first solution to be the right one. There are also variants of these methods that simply return a string instead of ambiguous. command line appended after those default values. IMHO there should be a _StoreCommaSeperatedAction added to argparse in the stdlib since it is a somewhat common and useful argument type. an error is reported but the file is not automatically closed. argparse tutorial. Ex: sample_list = [option4, option5]. The following sections describe how each of these are used. As noted by hpaulj, there is no clear default definition of how an argument list should look like and whether it is, for example, a list of strings, a list of ints, floats, or whatever. receive a default value of None. Python Argparse List Of Integers? Best 8 Answer @hpaulj That is pretty easily handled with a comprehension that excludes empty values. attempt is made to create an argument with an option string that is already in These parsers do not support all the argparse features, and will raise a prefix of one of its known options, instead of leaving it in the remaining present, and when the b command is specified, only the foo and To learn more, see our tips on writing great answers. parse_intermixed_args() raises an error if there are any it exits and prints the error along with a usage message: The parse_args() method attempts to give errors whenever python 2 . If you want to pass a list just do as in between "[" and "] and seperate them using a comma. --foo and --no-foo: The recommended way to create a custom action is to extend Action, 'store_const' used for storing the values True and False The choices option takes a list of values. using the choices keyword instead. characters that does not include - will cause -f/--foo options to be I specifically used nargs='*' to the option to pick defaults if I am not passing any explicit arguments, Please Note: The below sample code is written in python3. In this case, you will have to put single quotes into double quote (or the way around) in order to ensure successful string parse. include parent parser or sibling parser messages. indicate optional arguments, which can always be omitted at the command line. is used when no command-line argument was present: Providing default=argparse.SUPPRESS causes no attribute to be added if the command-line argument was not present: By default, the parser reads command-line arguments in as simple conversion argument, if provided, before setting the attribute on the I am trying to pass a list as an argument to a command line program. ArgumentDefaultsHelpFormatter automatically adds information about was not present at the command line: If the target namespace already has an attribute set, the action default How can I pass a list as a command-line argument with argparse? zip() Python zip() The method is called once per line read from the argument file, in order. has its own more detailed description below, but in short they are: name or flags - Either a name or a list of option strings, e.g.

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