Some caveats:

• The raw_input("...") and input("...") functions work a little differently here than in actual Python. They bring up a dialog box as a separate window, rather than having you type responses in the same window as the output. And, you must pass a string argument to each function.
• The input("...") function only accepts integers and floating point numbers. Normally, the Python input("...") function would accept any expression as input, such as quoted strings, variables, arithmetic operators, etc.
• This is a very incomplete implementation of Python. There are likely bugs, and many Python features are missing. But it should work for basic arithemtic and strings, and should be sufficient for at least some simple programs.