Log Message:
py-uncompyle6: updated to 3.4.0

3.4.0:
The main change is to add a tree-transformation phase. This simplifies the
code a little and allows us to turn if ...: raise AssertionError into
assert, and many if ..: else if ... into if ... elif ..

Use options --show=before and --show=after to see the before the tree \ 
transformation phase and after the tree transformation phase.