python redirect stdout code example

Example 1: redirect stdout to variable python

from cStringIO import StringIO # Python3 use: from io import StringIO
import sys

old_stdout = sys.stdout
sys.stdout = mystdout = StringIO()

# blah blah lots of code ...

sys.stdout = old_stdout

# examine mystdout.getvalue()

Example 2: redirect python output to file

$ python foo.py > file

Example 3: linux echo redirect output to python script

import sys
data = sys.stdin.readlines()