argparse

问题 I would like to have a required command line argument passed as a positional argument or an optional argument. For example, I would like the same action be performed from any of the following invocations: prog 10 prog -10 prog -n 10 prog --num 10 Is this possible with argparse? 回答1: With a mutually exclusive group I can create a reasonable approximation: In an interactive session: In [10]: parser=argparse.ArgumentParser() In [11]: grp=parser.add_mutually_exclusive_group(required=True) In [12]

问题 In my script I have 3 positional arguments and 1 optional argument. One of the three positional arguments is required and the rest is optional (as specified using narg='?' ). My optional argument doesn't pass any other arguments (action ='store_true') and is just there to enable sorting which will be implemented at a later time. However, my problem is that my optional argument only works when it is the first or last argument in the script call. Below is my script so far: parser = argparse

问题 I am creating a program that requires conditional arguments using argparse. I would like to generate new arguments in my code depending on if a previous argument has been entered or not. Here is a basic example of how I would like my code to look import argparse parser = argparse.ArgumentParser() parser.add_argument("-bowtie",action = "store_true",help="use to run bowtie") args = parser.parse_args() if args.bowtie: parser.add_argument( add some new argument here ) args = parser.parse_args()

问题 MacOSX launchd passes the -psn... parameter to applications. How can I tell argparse how to parse the parameter? It's basically -psn_([0-9]+)_([0-9]+) but I'm fine if it just parses -psn(\S*) . Is that possible at all? (See here for some documentation about the Process Serial Number (PSN). And here is my question about what to do with the parameter.) 回答1: Looking at the structure of the psn argument, it's not possible to parse it with argparse without interfering with a possible "-p" argument

问题 Looking at this answer, I could do this: parser=argparse.ArgumentParser() parser.add_argument('-D',action='append',help='FOO=BAR') options = parser.parse_args('-DVAR1=9 -DVAR2=Off'.split()) And I get: Namespace(D=['VAR1=9', 'VAR2=Off']) So then saying: [o.split('=') for o in options.D] Results in: [['VAR1', '9'], ['VAR2', 'Off']] This is basically what I need, but I feel this is a common action that might already have an implementation within the ArgParse package. Is there a more Pythonesque

问题 The code from argparse import ArgumentParser p = ArgumentParser(description = 'foo') p.add_argument('-b', '--bar', help = 'a description') p.parse_args() ...results in the output: $ python argparsetest.py -h usage: argparsetest.py [-h] [-b BAR] foo optional arguments: -h, --help show this help message and exit -b BAR, --bar BAR a description What I'd like is: $ python argparsetest.py -h foo optional arguments: -h, --help show this help message and exit -b BAR, --bar BAR a description e.g., no

问题 I am using Argparse as a means to command line utility execution. I have various arguments defined ( couple of them shown below ). I have a requirement to store argument name, help, type in the database in their respective columns. I am not sure how to extract these three from each parse.add_argument and save it in some array/list. If you can share any inputs, that would be helpful. parser.add_argument("num",help="The fibnocacci number to calculate:", type=int) # how to take the strings on

问题 I am converting Bash shell installer utility to Python 2.7 and need to implement complex CLI so I am able to parse tens of parameters (potentially up to ~150). These are names of Puppet class variables in addition to a dozen of generic deployment options, which where available in shell version. However after I have started to add more variables I faced are several challenges: 1. I need to group parameters into separate dictionaries so deployment options are separated from Puppet variables. If

问题 I am converting Bash shell installer utility to Python 2.7 and need to implement complex CLI so I am able to parse tens of parameters (potentially up to ~150). These are names of Puppet class variables in addition to a dozen of generic deployment options, which where available in shell version. However after I have started to add more variables I faced are several challenges: 1. I need to group parameters into separate dictionaries so deployment options are separated from Puppet variables. If

问题 I am trying to add option of options in argparse . Currently I have: group = parser.add_mutually_exclusive_group() group.add_argument("--md", help="Create xyz file for each ionic step for" " visualization", action='store_true') group.add_argument("--force", help="See which atom has maximum force", action='store_true') group.add_argument("--opt", help="grep string from file", nargs=2, metavar=("str", "file")) parser.add_argument("--xsf", help="Create xsf file for md(default is xyz)" "