Pycro - A python compiler


What is it?

Pycro is a library that attempts to compile python bytecode to i386 machine code.


To attempt to make some very small standalone python programs. And because it's funky ;-)


Pycro 0.3.0


What can it do?

So what can it do?

  • Use 'for' loops
  • Define lists
  • Use some builtin functions (min/max)
  • Import from other modules
  • Call functions (with arguments)
  • Print strings to standard output
  • Run 'while' loops
  • Evaluate integer expressions
  • Use assertions
  • Detect out of bound list reads & writes (optional)
  • Detect integer overflows (optional)

What can't it do?

  • Define classes
  • Use most builtin functions (including built-in member functions)
  • Use tuples / dictionaries / slices
  • Perform string manipulation (eg: joining)
  • Use 'or' or 'and' statements

How about some samples

All the python files immediately under the 'samples' directory can be compiled.


Why not PyPy?

PyPy is an attempt to create a python runtime written in python, whereas pycro attempts to statically compile python programs to machine code. In that sense pycro could be compared to the the restricted execution portion of PyPy, or ShedSkin.

So why not use / modify the restricted execution port of PyPy?

Because I wanted to write the program! No intention of taking over the world; it's just a bit of fun.

How optimised is the generated machine code?

It's not optimised at all! And it won't be for a long time (if ever)... That said, for code that manages to compile (and actually run!) it'll likely run a lot quicker then native python, plus not need any sort of a runtime.