zapy.py

import requests, json, re

def camelcase_to_underscore(text, lower=True):
    text = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', text)
    text = re.sub('([a-z0-9])([A-Z])', r'\1_\2', text)

    if lower:
        text = text.lower()

    return text

def underscore_to_camelcase(text, capfirst=False):
    text = ''.join(word.capitalize() or '_' for word in text.split('_'))

    if not capfirst:
        text = text[0].lower() + text[1:]

    return text

def dot_to_underscore(text, lower=True):
    text = text.replace('.', '_')

    if lower:
        text = text.lower()

    return text

def dot_to_camelcase(text, capfirst=False):
    text = dot_to_underscore(text, lower=False)
    text = underscore_to_camelcase(text, capfirst=capfirst)

    return text

class Apy(object):
    __base_url__ = ''

    def __init__(self, base_url=None, **kwargs):
        if base_url:
            self.__base_url__ = base_url

        self.__base_properties__ = kwargs

    def __getattr__(self, name):
        method = self.__tomethod__(name)

        def call(*args, **kwargs):
            url = self.__url__(method, args)

            properties = self.__base_properties__
            properties.update(kwargs)

            for key in properties.keys():
                properties[self.__toproperty__(key)] = properties.pop(key)

            return self.__request__(url, properties)

        return call

    def __tomethod__(self, name):
        return name

    def __toproperty__(self, name):
        return name

    def __url__(self, method, args):
        url = self.__base_url__ + method

        if args:
            url += u'/' + u'/'.join(map(unicode, args))

        return url

    def __request__(self, url, params):
        response = requests.get(url, params=params)

        if not self.__validate__(response):
            return

        return self.__parse__(response)

    def __validate__(self, response):
        if not 200 <= response.status_code < 300:
            raise Exception(self.__parse__(response))

        return True

    def __parse__(self, response):
        return response.json

class Zappos(Apy):
    __base_url__ = 'http://api.zappos.com/'

    def __tomethod__(self, name):
        return underscore_to_camelcase(name, capfirst=True)

    def __toproperty__(self, name):
        return underscore_to_camelcase(name, capfirst=False)

z = Zappos(key='YOUR_API_KEY')
print z.core_value()