Changes to ProgressBar: - Don't crash if max=0 - set() now has an optional max parameter, to set the maximum value.
Changes to ProgressBar:
- Don't crash if max=0
- set() now has an optional max parameter, to set the maximum value.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator