Execute a block of python code with exec, capturing all its output?

Question

What's a good way to exec a bunch of python code, like exec mycode, and capture everything it prints to stdout into a string?

Have a look at this answer. stackoverflow.com/questions/3906232/… It is replacing stdout for the time of execution. — Reiner Gerecke
– Reiner Gerecke, Commented Feb 5, 2011 at 0:06
@Reiner: Although this question is worded better, it's basically a dup of that one (and that one has a fantastic answer!). Should this be closed & pointed to that one? — Gerrat
– Gerrat, Commented Feb 5, 2011 at 0:12
ah i thought of doing something like that then decided it wouldnt work for some reason , but i guess not! — Claudiu
– Claudiu, Commented Feb 5, 2011 at 0:18

vrde · Accepted Answer · 2011-02-05 00:28:41Z

11

Try replacing the default sys.stdout, like in this snippet:

import sys
from StringIO import StringIO

buffer = StringIO()
sys.stdout = buffer

exec "print 'Hello, World!'"

#remember to restore the original stdout!
sys.stdout = sys.__stdout__

print buffer.getvalue()

edited Feb 5, 2011 at 0:28

answered Feb 5, 2011 at 0:17

vrde

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