When I try this code:
if Verbose:
print("Building internam Index for %d tile(s) ..." % len(inputTiles), end=' ')
I get a SyntaxError claiming that end=' ' is invalid syntax.
Why does this happen?
See What does "SyntaxError: Missing parentheses in call to 'print'" mean in Python? for the opposite problem.
See Why is parenthesis in print voluntary in Python 2.7? for general consequences of Python 2's treatment of print as a statement.