try/except is no longer a programmer trap.
You're almost always better off using a generator expression or list comprehension instead of a lambda. Also, multiline lambdas detract from readability.
Python is duck typed - no need for interfaces, though it'd be nice to have them in pylint. Python has abstract classes. Python has a weak form of private members.
Rumor has it that patches were submitted for removing the GIL from CPython once, but they made uniprocessor workloads so much slower that the patches were rejected.
C: Overcomplicated, but fast, and useful for extending most other languages
Java: Reasonable, but a bit wordy. Pretty marketable. Performs quite reasonably really, though slow to exec
C++:Probably best avoided unless you have libraries in C++ you must use (in which case you could use Cython)
Objective-C: Useless, except on an iPhone
C#: Another lockin trojan horse from Microsoft. Avoid.
PHP: Awful design. Avoid.
BASIC: Those whom the gods would destroy, first they teach BASIC.
Python: Very nice language to work in. Sacrifices performance a bit in the reference implementation, but pretty fast if you use Pypy. Can be extended using C or Cython. Sometimes off-putting to people who feel that programming "should be complicated".
Perl:What a mess! It's much too kitchen-sink. For people whose problem domains aren't complicated enough to keep them entertained, so they need a messy language to make things more interesting.
Ruby:Popular among Java programmers who don't want to use anything but Java. Kinda perlish, but not quite as bad.