add retry and exception support

tests/test_query.py

@@ -0,0 +1,12 @@
+from tests.helper import BaseTest
+from py12306.app.query import QueryTicket
+
+
+class TestQueryTicket(BaseTest):
+    task = {
+        'name': 'admin',
+    }
+
+    def test_get_query_api_type(self):
+        res = QueryTicket().get_query_api_type()
+        self.assertEqual('leftTicket/query', res)