CamelCaseJSONRenderer For django rest framework

parsers.py

from rest_framework.parsers import JSONParser
from django.conf import settings
import re
import json

first_cap_re = re.compile('(.)([A-Z][a-z]+)')
all_cap_re = re.compile('([a-z0-9])([A-Z])')

def camel_to_underscore(name):
    s1 = first_cap_re.sub(r'\1_\2', name)
    return all_cap_re.sub(r'\1_\2', s1).lower()

def underscoreize(data):
    if isinstance(data, dict):
        new_dict = {}
        for key, value in data.items():
            new_key = camel_to_underscore(key)
            new_dict[new_key] = underscoreize(value)
        return new_dict
    if isinstance(data, (list, tuple)):
        for i in range(len(data)):
            data[i] = underscoreize(data[i])
        return data
    return data

class CamelCaseJSONRenderer(JSONParser):
    def parse(self, stream, media_type=None, parser_context=None):
        parser_context = parser_context or {}
        encoding = parser_context.get('encoding', settings.DEFAULT_CHARSET)

        try:
            data = stream.read().decode(encoding)
            return underscoreize(json.loads(data))
        except ValueError as exc:
            raise ParseError('JSON parse error - %s' % six.text_type(exc))

renderers.py

from rest_framework.renderers import JSONRenderer
import re

def underscoreToCamel(match):
    return match.group()[0] + match.group()[2].upper()

def camelize(data):
    if isinstance(data, dict):
        new_dict = {}
        for key, value in data.items():
            new_key = re.sub(r"[a-z]_[a-z]", underscoreToCamel, key)
            new_dict[new_key] = camelize(value)
        return new_dict
    if isinstance(data, (list, tuple)):
        for i in range(len(data)):
            data[i] = camelize(data[i])
        return data
    return data

class CamelCaseJSONRenderer(JSONRenderer):

    def render(self, data, *args, **kwargs):
        return super(CamelCaseJSONRenderer, self).render(camelize(data), *args, **kwargs)

settings.py

# ...
REST_FRAMEWORK = {

    'DEFAULT_RENDERER_CLASSES': (
        'utils.api.renderers.CamelCaseJSONRenderer',
        'rest_framework.renderers.BrowsableAPIRenderer',
    ),

    'DEFAULT_PARSER_CLASSES': (
        'utils.api.parsers.CamelCaseJSONRenderer',
        'rest_framework.parsers.FormParser',
        'rest_framework.parsers.MultiPartParser'
    ),

# ...