How to use the easypost.__init__.Error function in easypost

def handle_api_error(self, http_status, http_body, response):
        try:
            error = response['error']
        except (KeyError, TypeError):
            raise Error("Invalid response from API: (%d) %r " % (http_status, http_body), http_status, http_body)

        try:
            raise Error(error.get('message', ''), http_status, http_body)
        except AttributeError:
            raise Error(error, http_status, http_body)

headers = {
            'X-Client-User-Agent': json.dumps(ua),
            'User-Agent': USER_AGENT,
            'Authorization': 'Bearer %s' % my_api_key,
            'Content-type': 'application/x-www-form-urlencoded'
        }

        if timeout > _max_timeout:
            raise Error("`timeout` must not exceed %d; it is %d" % (_max_timeout, timeout))

        if request_lib == 'urlfetch':
            http_body, http_status = self.urlfetch_request(method, abs_url, headers, params)
        elif request_lib == 'requests':
            http_body, http_status = self.requests_request(method, abs_url, headers, params)
        else:
            raise Error("Bug discovered: invalid request_lib: %s. "
                        "Please report to contact@easypost.com." % request_lib)

        return http_body, http_status, my_api_key

raise Error("Bug discovered: invalid request method: %s. "
                        "Please report to contact@easypost.com." % method)

        try:
            result = requests_session.request(
                method,
                abs_url,
                headers=headers,
                data=data,
                timeout=timeout,
                verify=True,
            )
            http_body = result.text
            http_status = result.status_code
        except Exception as e:
            raise Error("Unexpected error communicating with EasyPost. If this "
                        "problem persists please let us know at contact@easypost.com.")
        return http_body, http_status

def request_raw(self, method, url, params=None, apiKeyRequired=True):
        if params is None:
            params = {}
        my_api_key = self._api_key or api_key

        if apiKeyRequired and my_api_key is None:
            raise Error(
                'No API key provided. Set an API key via "easypost.api_key = \'APIKEY\'. '
                'Your API keys can be found in your EasyPost dashboard, or you can email us '
                'at contact@easypost.com for assistance.')

        abs_url = self.api_url(url)
        params = self._objects_to_ids(params)

        ua = {
            'client_version': VERSION,
            'lang': 'python',
            'publisher': 'easypost',
            'request_lib': request_lib,
        }
        for attr, func in (('lang_version', platform.python_version),
                           ('platform', platform.platform),
                           ('uname', lambda: ' '.join(platform.uname()))):

def handle_api_error(self, http_status, http_body, response):
        try:
            error = response['error']
        except (KeyError, TypeError):
            raise Error("Invalid response from API: (%d) %r " % (http_status, http_body), http_status, http_body)

        try:
            raise Error(error.get('message', ''), http_status, http_body)
        except AttributeError:
            raise Error(error, http_status, http_body)

def requests_request(self, method, abs_url, headers, params):
        method = method.lower()
        if method == 'get' or method == 'delete':
            if params:
                abs_url = self.build_url(abs_url, params)
            data = None
        elif method == 'post' or method == 'put':
            data = self.encode(params)
        else:
            raise Error("Bug discovered: invalid request method: %s. "
                        "Please report to contact@easypost.com." % method)

        try:
            result = requests_session.request(
                method,
                abs_url,
                headers=headers,
                data=data,
                timeout=timeout,
                verify=True,
            )
            http_body = result.text
            http_status = result.status_code
        except Exception as e:
            raise Error("Unexpected error communicating with EasyPost. If this "
                        "problem persists please let us know at contact@easypost.com.")

elif method == 'get' or method == 'delete':
            abs_url = self.build_url(abs_url, params)
        else:
            raise Error("Bug discovered: invalid request method: %s. Please report "
                        "to contact@easypost.com." % method)

        args['url'] = abs_url
        args['method'] = method
        args['headers'] = headers
        args['validate_certificate'] = False
        args['deadline'] = timeout

        try:
            result = urlfetch.fetch(**args)
        except:
            raise Error("Unexpected error communicating with EasyPost. "
                        "If this problem persists, let us know at contact@easypost.com.")

        return result.content, result.status_code