Richard Oudkerk <[email protected]> added the comment:
Actually, if you replace
print(os.popen("uname").read())
with
f = os.popen("uname")
print(f.read())
f.close()
or
with os.popen("uname") as f:
print(f.read())
then things should work. This is because f.close() waits for the pid.
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<http://bugs.python.org/issue15408>
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