subprocess query

Sudheer inbox1.sudheer at gmail.com
Sat Jul 3 10:33:49 EDT 2010


Hi,
 What's wrong with the following code. The program waits indefenitely
at  'output = p2.stdout.read()'


from subprocess import *

p1=Popen(['tr', 'a-z', 'A-Z'],stdin=PIPE,stdout=PIPE)
p2=Popen(['tr','A-Z', 'a-z'],stdin=p1.stdout,stdout=PIPE)
p1.stdin.write("hello")
p1.stdin.close()

output = p2.stdout.read()

print output


-- 
Thanks
Sudheer



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