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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create(kls, url, strict=True):
 """ factory of App :param str url: url of path of Swagger API definition :param bool strict: when in strict mode, exception would be raised if not valid. :return: the created App object :rtype: App :raises ValueError: if url is wrong :raises NotImplementedError: the swagger version is not supported. """

        app = kls.load(url)
        app.prepare(strict=strict)

        return app