How can I get print function output ?

[nilamo]

You could also redirect the output to a stringio object...

>>> import io
>>> text = io.StringIO()
>>> print("just some stuff", file=text)
>>> print("more things", file=text)
>>> text.seek(0)
0
>>> text.readlines()
['just some stuff\n', 'more things\n']
>>> text.getvalue()
'just some stuff\nmore things\n'