transform_camel_snake.py

import json 
import re 
  
def to_snake(input_str): 
    s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', input_str) 
    return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower() 

def to_camel(input_str):
    return re.sub(r'_([a-z])', lambda x: x.group(1).upper(), input_str)

def transorm_request(req, t_func):

    output = req
    
    if isinstance(req, dict):
        output = {}
        for k, v in req.items():
            output[t_func(k)] = transorm_request(v, t_func)
        
    elif isinstance(req, list):
        output = []
        for item in req:
            output.append(transorm_request(item, t_func))

    elif isinstance(req, str):
        output = t_func(req)

    return output
    
t = {
    "tShirt": [
        {
            "aBook": 2
        },
        {
            "bBook": "cBook"
        }
    ],
    "noteBook": {
        "yooHoo": 2,
        "barrrRaaa": "helloWorld"
    },
    "faceBook": 5
}

y = transorm_request(t, to_snake)

print(y)

e = transorm_request(y, to_camel)

print(e)

print(e == t)