pycnite_pyc_bytecode_reader_with_recursive_instruction_printing.py

1import sys
2from pycnite import mapping
3
4def main(filename):
5    # Load the pyc file
6    with open(filename, "rb") as f:
7        code_obj = mapping.load(f)
8    
9    # Recursively print the bytecode instructions
10    def print_code(code):
11        print(f"Code object: {code.name}")
12        for instr in code.instructions:
13            print(f"  {instr.offset:4} {instr.opname:<20} {instr.argval}")
14        
15        # Recurse into nested code objects (e.g., functions, classes)
16        for const in code.consts:
17            if hasattr(const, "instructions"):
18                print_code(const)
19
20    print_code(code_obj)
21
22if __name__ == "__main__":
23    if len(sys.argv) > 1:
24        main(sys.argv[1])
25    else:
26        print("Usage: python example.py <path_to_file.pyc>")