python argparse to handle arbitrary numeric options (like HEAD(1))
Is there a way to trick argparse into accepting arbitrary numeric arguments like HEAD(1) ?
head -5 test.txt
is equivalent to
head -n 5 test.txt
My current approach is to use parse_known_args() and then handle the remainder, but I'd wish there was something a tad more elegant.
agrparse和optparse都不支持这一点。
对的，这是可能的：
#!/usr/bin/env python
# coding: utf-8
from argparse import ArgumentParser
parser = ArgumentParser(description='Argparse with numeric arguments')
parser.add_argument('-0', action='store_true', help='null separator')
args = parser.parse_args()
print vars(args)['0']
作为使用vars(args)['0] @ vault的答案的替代方法，您也可以使用args.__dict__['0']