Currently the situation is as follows. Note that development is going fast and features are quickly moving from "not supported" to supported.

Supported

• Data types supported : int, float, double, ndarray.
• User defined classes supported.
• Functions supported.
• For loop over range/xrange.

Not supported

• Lists, dicts, tuples
• Multiple inheritance.
• Keyword arguments.
• Lambda
• Exceptions
• Decorators
• Iterators and generators
• Dynamic code execution
• Metaclasses
• Negative indices for ndarray.
• Ufuncs
• Dynamic redefinition of functions and classes etc.
• Properties, staticmethod, classmethod, class attributes.
• Magic methods such as new, add etc.
• "with" statement
• subclassing int, float, double or ndarray

Broken. Being fixed

• Imports
• While loop