argparse

I'm writing test cases for argparse implementation. I intend to test '-h' feature. The following code does it. But it also outputs the usage for the script. Is there a way to suppress that? self.assertRaises(SystemExit, arg_parse_obj.parse_known_args, ['-h']) Also, can we check for the exception number thrown? For example '-h' throws SystemExit: 0 , while invalid or insufficient args throw SystemExit: 2 . Is there a way to check the numeric code? When testing for exception codes, use self.assertRaises() as a context manager ; this gives you access to the raised exception, letting you test the

I'm using argparse module to set my command line options. I'm also using a dict as a config in my application. Simple key/value store. What I'm looking for is a possibility to override JSON options using command line arguments, without defining all possible arguments in advance. Something like --conf-key-1 value1 --conf-key-2 value2 , which would create a dict {'key_1': 'value1','key_2': 'value2'} ('-' in the argument is replaced by '_' in the dict). Then I can combine this dict with my JSON config (dict). So basically I would like to define --conf-* as an argument, where * can be any key and

argparse uses per default abbreviation in unambiguous cases. I don't want abbreviation and I'd like to disable it. But didn't find it in the documentation . Is it possible? Example: import argparse parser = argparse.ArgumentParser() parser.add_argument('--send', action='store_true') parser.parse_args(['--se']) # returns Namespace(send=True) But I want it only to be true when the full parameter is supplied. To prevent user errors. UPDATE: I created a ticket at python bugtracker after Vikas answer. And it already has been processed. As of Python 3.5.0 you can disable abbreviations by initiating

I'm using Python 2.7 and I'm trying to accomplish a shell like behavior using argparse. My issue, in general, that I cannot seem to find a way, in Python 2.7, to use argparse's subparsers as optional. It's kind of hard to explain my issue so I'll describe what I require from my program. The program has 2 modes of work: Starting the program with a given command (each command has it's own additional arguments) and additional arguments will run a specific task. Starting the program without a command will start a shell-like program that can take a line of arguments and process them as if the

1.argparse包 1.argparse包 　　argparse tutorial地址： https://docs.python.org/3/howto/argparse.html#introducing-positional-arguments 来源： https://www.cnblogs.com/ylwn/p/11494373.html

Using argparse in relation to Python dependencies between groups using argparse , I have an argument part of some parser group of a parser - for example: group_simulate.add_argument('-P', help='simulate FC port down', nargs=1, metavar='fc_port_name', dest='simulate') How it's possible to use the choices to limit the choices to a list of parameters of the next structure: 1:m:"number between 1 and 10":p:"number between 1 and 4" I have tried to use the range option but I couldn't find a way to create a list of choices that are acceptable examples: legal parameters: test.py -P 1:m:4:p:2 not legal