There are relatively few "true" Python compilers out there ("true" in the sense that they take Python in and generate x86 [or whatever] code directly as the output). This is probably due to the design of Python, which generally supports much better approaches to solving the problems that compilers typically address. E.g., for performance, Python is more than happy to let you link to code written in C/C++/Assembly/etc. without much fuss.
What limitation are you seeing in Python that you'd like a compiler to address?
(As you're probably aware, Python code is always compiled down to a "byte code" -- these are the *.pyc files.)