gistfile1.py

def generate(code):
    code_obj = compile(code, '<string>', 'exec')
    code_ = code_obj.co_code
    code = ''
    for char in code_:
        code += 'chr(' + str(hex(ord(char))) + ')+'
    code = code[:-1]
    return "type(make_secure)(code=type(make_secure.__code__)(%d,%d,%d,%d,%s,%s,%s,%s,'%s','%s',%d,'%s'),globals={})()" % (code_obj.co_argcount, code_obj.co_nlocals, code_obj.co_stacksize, code_obj.co_flags, code, str(code_obj.co_consts).replace(' ', ''), str(code_obj.co_names).replace(' ', ''), str(code_obj.co_varnames).replace(' ', ''), code_obj.co_filename, code_obj.co_name, code_obj.co_firstlineno, str(code_obj.co_lnotab))

if __name__ == "__main__":
    print generate("print(open('key').read())")