python - Limit number of arguments passed in -


i using argparse take list of input files:

import argparse p = argparse.argumentparser() p.add_argument("infile", nargs='+', type=argparse.filetype('r'),  help="copy from") p.add_argument("outfile", help="copy to") args = p.parse_args()

however, opens door user pass in prog /path/to/* outfile, source directory potentially have millions of file, shell expansion can overrun parser. questions are:

  1. is there way disable shell expansion (*) within?

  2. if not, if there way put cap on number of input files before assembled list?

(1) no, shell expansion done shell. when python run, command line expanded already. use "*" or '*' deactivate happens on shell.

(2) yes, length of sys.argv in code , exit if long.

also shells have built-in limit expansion.


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