Extract codes in the form of raw string of json and write to source code file.

extract.py

################################################################################
# Suppose we have a json file `jcodes.json` as shown which contains some C++
# code as string. This python program can generate C++ source files containing
# the code.
################################################################################

import json
import os

with open("jcodes.json", "r", encoding="utf-8") as code:
    lists = json.load(code)["codes"]
    for list in lists:
        path = list["id"]
        if not os.path.exists(path):
            os.makedirs(path)
        with open(path + "/code.cpp", "w", encoding="utf-8") as target:
            target.write(list["code"])

jcodes.json

{
    "_comment": "A json example",
    "codes": [
        {
            "id": "hello_world",
            "code": "#include <iostream>\n\nint main()\n{\n\tstd::cout << \"Hello, world!\\n\" << std::endl;\n\treturn 0;\n}\n"
        },
        {
            "id": "goodbye_world",
            "code": "#include <iostream>\n\nint main()\n{\n\tstd::cout << \"Goodbye, world!\\n\" << std::endl;\n\treturn 0;\n}\n"
        }
    ]
}