Lib/test/test_select.py

   1 # Testing select module
   2
   3 def test():
   4         import select
   5         import os
   6         cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do date; sleep 3; done'
   7         p = os.popen(cmd, 'r')
   8         for tout in (0, 1, 2, 4, 8, 16) + (None,)*10:
   9                 print 'timeout =', tout
  10                 rfd, wfd, xfd = select.select([p], [], [], tout)
  11                 print rfd, wfd, xfd
  12                 if (rfd, wfd, xfd) == ([], [], []):
  13                         continue
  14                 if (rfd, wfd, xfd) == ([p], [], []):
  15                         line = p.readline()
  16                         print `line`
  17                         if not line:
  18                                 print 'EOF'
  19                                 break
  20                         continue
  21                 print 'Heh?'
  22
  23 test()