Like xargs, but for STDIN (run a command for each line, piping the line to STDIN)

xstream

#!/usr/bin/python

import sys, subprocess

def main(args=sys.argv):
  if len(args) < 2:
    print "Usage: %s <command>" % (args[0])
    exit 1
  while True:
    try: line = raw_input(None)
    except EOFError: break
    if line != "":
      proc = subprocess.Popen(args[1:], stdin=subprocess.PIPE)
      proc.stdin.write(line)
      proc.stdin.close()
      proc.wait()

if __name__=="__main__":
  main(sys.argv)