feature request: ternary fallthroughs

[buran]

heres what is happening:
val = int(sys.argv[1]) if int(sys.argv[1]) else fallthrough

if sys.argv[1] is not convertable to int it will not reach the if part at all because you will get exception.
Not to mention that converting to int twice is redundant. try/except is much cleaner and idiomatic.

As a side note, the 57 lines in your example can be shortned to ~ 20 if done properly - there is a lot of redundant code