Hi everyone,
Today I came accross a behaviour I did not expect in python (I am using 2.7).
In my program, random.random() always seemed to return the same number; it
turned out to be related to the fact that I was using os.fork.
See below a small program that illustrates this. It is easily fixed, but I'm
interested in knowing why this happens. Can anybody give me a hint? Thanks!
import random
import os
for i in xrange(10):
pid = os.fork()
if pid == 0:
# uncommenting this fixes the problem
# random.seed(os.getpid())
print random.random()
os._exit(0)
os.wait()
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