Fix various import issues

[etc/taskwarrior.git] / tasklib / backends.py

diff --git a/tasklib/backends.py b/tasklib/backends.py
index fe24fd205d521c64214418afd7bb0c64b30b07df..edf9ac3eeca32526b95ae3dc8e837dc87fd9c830 100644 (file)
--- a/tasklib/backends.py
+++ b/tasklib/backends.py
@@ -1,11 +1,14 @@
 import abc
 import abc

+import datetime

 import json
 import os
 import re
 import json
 import os
 import re

+import six

 import subprocess
 
 import subprocess
 

-from tasklib.filters import TaskWarriorFilter
-from tasklib.serializing import local_zone
+from .task import Task, TaskQuerySet
+from .filters import TaskWarriorFilter
+from .serializing import local_zone

 
 DATE_FORMAT_CALC = '%Y-%m-%dT%H:%M:%S'
 
 
 DATE_FORMAT_CALC = '%Y-%m-%dT%H:%M:%S'
 


@@ -22,7 +25,10 @@ VERSION_2_4_5 = six.u('2.4.5')
 
 class Backend(object):
 
 
 class Backend(object):
 

-    filter_class = TaskWarriorFilter
+    @abc.abstractproperty
+    def filter_class(self):
+        """Returns the TaskFilter class used by this backend"""
+        pass

 
     @abc.abstractmethod
     def filter_tasks(self, filter_obj):
 
     @abc.abstractmethod
     def filter_tasks(self, filter_obj):


@@ -208,6 +214,10 @@ class TaskWarrior(object):
                              "datetime, its type is not supported: {}"
                              .format(type(value)))
 
                              "datetime, its type is not supported: {}"
                              .format(type(value)))
 

+    @property
+    def filter_class(self):
+        return TaskWarriorFilter
+

     # Public interface
 
     def get_config(self):
     # Public interface
 
     def get_config(self):