Import StringIO StringIO.StringIO()
should be : Import six six.StringIO()
six.StringIO is an alias for StringIO.StringIO in Python 2 and io.StringIO in Python3.
For Python3 compatible.
Import StringIO
StringIO.StringIO()
should be :
Import six
six.StringIO()
six.StringIO is an alias for StringIO.StringIO in Python 2 and io.StringIO in Python3.
For Python3 compatible.