Move import_class to utils

Author: Ryan P Kilby

rest_framework_filters/filters.py

@@ -4,18 +4,12 @@
 from django.utils import six
 
 from django_filters.rest_framework.filters import *
+from rest_framework_filters.utils import import_class
 
 
 ALL_LOOKUPS = '__all__'
 
 
-def _import_class(path):
-    module_path, class_name = path.rsplit('.', 1)
-    class_name = str(class_name)  # Ensure not unicode on py2.x
-    module = __import__(module_path, fromlist=[class_name], level=0)
-    return getattr(module, class_name)
-
-
 class AutoFilter(Filter):
     def __init__(self, *args, **kwargs):
         self.lookups = kwargs.pop('lookups', [])
@@ -33,7 +27,7 @@ def __init__(self, filterset, *args, **kwargs):
     def filterset():
         def fget(self):
             if isinstance(self._filterset, six.string_types):
-                self._filterset = _import_class(self._filterset)
+                self._filterset = import_class(self._filterset)
             return self._filterset
 
         def fset(self, value):

rest_framework_filters/utils.py

@@ -9,6 +9,13 @@
 from django.utils import six
 
 
+def import_class(path):
+    module_path, class_name = path.rsplit('.', 1)
+    class_name = str(class_name)  # Ensure not unicode on py2.x
+    module = __import__(module_path, fromlist=[class_name], level=0)
+    return getattr(module, class_name)
+
+
 def lookups_for_field(model_field):
     """
     Generates a list of all possible lookup expressions for a model field.