Creating functions through bytecode about bytecode HOT 3 OPEN

from bytecode import ConcreteBytecode, ConcreteInstr

bytecode_fn = ConcreteBytecode()
bytecode_fn.varnames = ["x"]
bytecode_fn.consts = [10]
bytecode_fn.argcount = 1
bytecode_fn.extend([ConcreteInstr("LOAD_FAST", 0),  # var x
                    ConcreteInstr("LOAD_CONST", 0),
                    ConcreteInstr("BINARY_ADD"),    # Add 10
                    ConcreteInstr("RETURN_VALUE")])
fn_code_obj = bytecode_fn.to_code()


bytecode = ConcreteBytecode()
bytecode.names = ["some_fn"]
bytecode.consts = [fn_code_obj, "some_fn", None]
bytecode.extend([ConcreteInstr("LOAD_CONST", 0),    # fn_code_obj
                 ConcreteInstr("LOAD_CONST", 1),    # "some_fn"
                 ConcreteInstr("MAKE_FUNCTION", 0),
                 ConcreteInstr("STORE_NAME", 0),    # "some_fn"
                 ConcreteInstr("LOAD_CONST", 2),    # None
                 ConcreteInstr("RETURN_VALUE")])

# Execute bytecode
code = bytecode.to_code()
exec(code)

some_fn(1) # Returns 11