from abc import ABCMeta, abstractmethod


class ClientBase(metaclass=ABCMeta):
    @abstractmethod
    def download(self):
        pass

    @abstractmethod
    def upload(self):
        pass

    @abstractmethod
    def execute_query(self):
        pass

    @abstractmethod
    def execute_long_running_query(self):
        pass

@@ -12,20 +12,16 @@
 port ABC
-Meta
 , abstra
@@ -52,25 +52,11 @@
 ase(
-metaclass=ABCMeta
+ABC
 ):%0A 

fix python 2.7 tests