@classmethod
    def retrieve(cls, easypost_id, api_key=None, **params):
        try:
            easypost_id = easypost_id['id']
        except (__HOLE__, TypeError):
            pass

        requestor = Requestor(api_key)
        url = "%s/%s" % (cls.class_url(), easypost_id)
        response, api_key = requestor.request('get', url)
        return response["signed_url"]
dataset/ETHPy150Open EasyPost/easypost-python/easypost/__init__.py/Blob.retrieve