'Extra call to get account\'s limits, such as
rates (for example amount of POST requests per day)
and absolute limits like total amount of available
RAM to be used by servers.
:return: dict with keys \'rate\' and \'absolute\'
:rtype: ``dict``'

def ex_limits(self):

    def _to_rate(el):
        rate = {}
        for item in list(el.items()):
            rate[item[0]] = item[1]
        return rate
    def _to_absolute(el):
        return {el.get('name'): el.get('value')}
    limits = self.connection.request('/limits').object
    rate = [_to_rate(el) for el in findall(limits, 'rate/limit', self.XML_NAMESPACE)]
    absolute = {}
    for item in findall(limits, 'absolute/limit', self.XML_NAMESPACE):
        absolute.update(_to_absolute(item))
    return {'rate': rate, 'absolute': absolute}
