Mock Python's built in print function

Question

I\'ve tried

from mock import Mock
import __builtin__

__builtin__.print = Mock()

But that raises a syntax error. I\'ve also tried patching

Answer 1

print is a keyword in python 2.x, using it as attribute raises a SyntaxError. You can avoid that by using from __future__ import print_function in the beginning of the file.

Note: you can't simply use setattr, because the print function you modified doesn't get invoked unless the print statement is disabled.

Edit: you also need to from __future__ import print_function in every file you want your modified print function to be used, or it will be masked by the print statement.