Python 3.7 support

[einarf]

Actively catch StopIteration. Generators no longer consume this exception.

This was introduced in PEP 479

[einarf]

To explain this a bit further:

We fill lists data using a generator like this:

vertices += list(self.consume_faces())

This is much simpler and efficient than constantly calling append().

consume_faces keeps yielding values and the list will keep consuming them.

def consume_faces(self): while True: # This method calls ``next()`` on a generator reading from the file. # It will ``raise StopIteration`` when there are no more lines self.next_line()

In python 3.7 a generator no longer consumes the StopIteration exception and considers it a runtime error. Instead we need to catch the exception and return from the method instead.

def consume_faces(self): while True: try: self.next_line() except StopIteration: break

[greenmoss]

LGTM; thanks!

[einarf]

Should probably release a new version before closing this one. The issue is not resolved from the end users perspective.