Perl requires a 'use version' statement otherwise your code can't use anything added since ~15 years ago. Python has no such system, so it's hard to know if the

Perl requires a 'use version' statement otherwise your code can't use anything added since ~15 years ago. Python has no such system, so it's hard to know if the code is going to work on any given version of python. The core modules also seem to change much more often than Perl's.