What are some of these better languages that you're referring to? (The usual dynamic language JITs I hear people praise are LuaJIT and Chez. And V8. And the JVM?)
And the usual, in Python everything is dynamic, well it is even more so in an image based live coding environment, where any break into the debugger, with code changes and resume execution can come back to a complete different world.
Additionally there are features like Smalltalk become: message, where two objects can change places everywhere they are used in the image, and current execution.
That trace back to Apple's efforts with MacRuby, or Sun's (for a while Netbeans even had Ruby support).
The Ruby JITs I mentioned are used in production.
While other dynamic language comunities embrace their JITs, in Python world, outside using it as a DSL for GPGPU JITs, it is pretty much let's just keep using CPythion with C and C++ extensions. Adding a JIT to CPython only became a thing after Facebook and Microsoft decided to push for its development.