Python recursive call as decorator.

example.py

from bson import ObjectId
import functools

# Created by Nimit Suwannagate

def recursive_all(f):
    """
    Decorator for making recursive function.
    :param f:
    :return:
    """
    @functools.wraps(f)
    def wrapper(*args):
        # Check if variable is list, make recursive call
        if isinstance(args[0], list):
            for index, child_v in enumerate(args[0]):
                args[0][index] = wrapper(child_v)

        # Check if variable is dict, make recursive call too.
        if isinstance(args[0], dict):
            for key, child_v in args[0].items():
                args[0].__setitem__(key, wrapper(child_v))

        return f(args[0])
    return wrapper


@recursive_all
def convert_safe_jsonify(v: any) -> any:
    """
    Convert variable to safe type for jsonify
    :param v:
    :return:
    """
    # Add type conversion for safe jsonify
    # jsonify don't support object id so make it as string
    if isinstance(v, ObjectId):
        v = str(v)

    return v


# OLD WAY!
def old__convert_safe_jsonify(v: any) -> any:
    """
    Convert variable to safe type for jsonify
    :param v:
    :return:
    """

    # Check if variable is list, make recursive call
    if isinstance(v, list):
        for index, child_v in enumerate(v):
            v[index] = convert_safe_jsonify(child_v)

    # Check if variable is dict, make recursive call too.
    if isinstance(v, dict):
        for key, child_v in v.items():
            v.__setitem__(key, convert_safe_jsonify(child_v))

    # Add type conversion for safe jsonify
    # jsonify don't support object id so make it as string
    if isinstance(v, ObjectId):
        v = str(v)

    return v