import sys

realstdout = sys.stdout

test = ''

class mine:
    def write(self, buffer):
        global test
        test = test + buffer
        realstdout.write(buffer)

sys.stdout = mi = mine()
mi.write('test')
print test
test = ''

import code
ii = code.InteractiveInterpreter()
ii.runsource('54')

sys.stdout = realstdout

print test