When I type code in Pythonista, when it is longer than screen width, I can no longer see it. It just comes out as a strange blob (in magnifying glass in picture) rather than a triangle and then the continuation on a new line. 
I have noticed a similar bug, albeit not quite the same. When the line starts with a tab (or space) and it extends beyond the screen, instead of the code appearing on the next line it just "disappears". If the line doesn't start with a tab, however, the next line feature works fine.
I think this is a problem with iOS 7 as I did not see this problem on iOS 6. I should point out I'm using the iPad2.
Thanks,
Cubbarooney
UPDATE: The tabs issue was fixed quite elegantly with the soft tabs feature of Pythonista v1.4.
Convert all tabs to 4 spaces and I bet your problems go away.
That, worked thanks! I can't figure out how to use the script though, so I did it manually.
I'm getting this same bug on iPhone 5/iOS 7. The workaround above isn't very useful since all the built-in examples use tabs, so here's hoping this gets fixed soon!
An update is on the way (currently waiting for Apple's review).
@omz Thanks for quick update...