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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 _determine_ctxt(self):
 """Determines the Volume API endpoint information. Determines the appropriate version of the API that should be used as well as the catalog_info string that would be supplied. Returns a dict containing the volume_api_version and the volume_catalog_info. """

        rel = os_release(self.pkg, base='icehouse')
        version = '2'
        if CompareOpenStackReleases(rel) >= 'pike':
            version = '3'

        service_type = 'volumev{version}'.format(version=version)
        service_name = 'cinderv{version}'.format(version=version)
        endpoint_type = 'publicURL'
        if config('use-internal-endpoints'):
            endpoint_type = 'internalURL'
        catalog_info = '{type}:{name}:{endpoint}'.format(
            type=service_type, name=service_name, endpoint=endpoint_type)

        return {
            'volume_api_version': version,
            'volume_catalog_info': catalog_info,
        }