Remember NOT to jump into Python for your new product if don't know Python. If you are developing for a young startup, have time crunch, then stick to what you know.
IF you do not have a language, or know Python a bit, then pick Python. Here are some of the reasons why I stick to Python (young startup/web APIs):
- OOPs is not too strict (might give a headache to some folks)
- Mixins, lambda, decorators, comprehensions - Pythonic ways make me feel productive easily
- Create a data Model, drop into a shell, import and try things
- Can do that on a live server
- Do the same with Controllers, or anything else actually
- really nothing fancy needed
- Command line processing, SSH, OS integration, etc. has so many great libs
- Python Dict someone looks like JSON (this is purely accidental but useful)
- Debugger support even in free IDE like PyCharm Community Ed is great
- Integration to a world of services is so easy, even ones you do not commonly see
- Documentation - many libs have consistent structure and that helps a LOT
- Really large community, perhaps only smaller than Java
- The even larger group of people using Python in all sorts of domains from Biotech to OS scripts