manbytesgnu_site

Source files for manbytesgnu.org
git clone git://holbrook.no/manbytesgnu_site.git
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stdinargs.py (556B)

      1 import sys
      2 import select
      3 import argparse
      4 
      5     def stdincheck():
      6     h = select.select([sys.stdin], [], [], 0)       # 0 = poll, noblock
      7     if len(h[0]) > 0:
      8             v = h[0][0].read()
      9             return v.rstrip()
     10     return None
     11 
     12     argparser = argparse.ArgumentParser()
     13     argparser.add_argument('val', nargs='?', default=stdincheck(), type=str, help='input val')
     14     args = argparser.parse_args(sys.argv[1:])
     15 
     16     if args.val == None:
     17        argparser.error('value but be specified on stdin or as first positional argument')
     18 
     19     print(args.val)