A Python interpreter squeezed into 1024 bytes of C

Making a Python interpreter in 1024 bytes

Austin Z. Henley, a professor and tool builder, takes on the challenge of writing a Python interpreter in just 1024 bytes of C code. He starts with a recursive descent parser, then adds control flow by using the C call stack for indentation-based blocks and jumping back to reparse loops. The final golfed version supports variables, arithmetic, comparisons, if/else, while and for loops, functions, and print statements—enough to run FizzBuzz. He shares the full source and the golfing tricks that made it possible.