popen problem

[Marco Catunda]

What's wrong with this code?

##########################
import threading
import os

class TestPopen( threading.Thread ):

   def run( self ):
      while 1:
         f = os.popen( "ls -l /" )
         lines = f.read()
         f.close()

if __name__ == "__main__":
   for i in range(50):
      t = TestPopen()
      t.start()
###########################

Let it run about 1 minute.
And, the result is:

Exception in thread Thread-10:
Traceback (innermost last):
  File "/var/tmp/python/python-root/usr/lib/python1.5/threading.py", line
376, in __bootstrap
    self.run()
  File "teste.py", line 10, in run
    f.close()
IOError: (0, 'Error')

Exception in thread Thread-11:
Traceback (innermost last):
  File "/var/tmp/python/python-root/usr/lib/python1.5/threading.py", line
376, in __bootstrap
    self.run()
  File "teste.py", line 10, in run
    f.close()
IOError: (0, 'Error')

....



Please, how do I correct it?
I used the same idea in another more complex code and I've had the same
problem.

-- Marco Catunda