diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 907bab749..74b4cb7c2 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -28,7 +28,7 @@ def is_simple_callable(obj):
     return (
         (inspect.isfunction(obj) and not inspect.getargspec(obj)[0]) or
         (inspect.ismethod(obj) and len(inspect.getargspec(obj)[0]) <= 1)
-        )
+    )
 
 
 class Field(object):
@@ -217,7 +217,6 @@ class ModelField(WritableField):
     """
     A generic field that can be used against an arbitrary model field.
     """
-
     def __init__(self, *args, **kwargs):
         try:
             self.model_field = kwargs.pop('model_field')
@@ -225,9 +224,9 @@ class ModelField(WritableField):
             raise ValueError("ModelField requires 'model_field' kwarg")
 
         self.min_length = kwargs.pop('min_length',
-            getattr(self.model_field, 'min_length', None))
+                            getattr(self.model_field, 'min_length', None))
         self.max_length = kwargs.pop('max_length',
-            getattr(self.model_field, 'max_length', None))
+                            getattr(self.model_field, 'max_length', None))
 
         super(ModelField, self).__init__(*args, **kwargs)
 
@@ -437,7 +436,7 @@ class PrimaryKeyRelatedField(RelatedField):
             # RelatedObject (reverse relationship)
             obj = getattr(obj, self.source or field_name)
             return self.to_native(obj.pk)
-            # Forward relationship
+        # Forward relationship
         return self.to_native(pk)
 
 
@@ -472,7 +471,7 @@ class ManyPrimaryKeyRelatedField(ManyRelatedField):
             # RelatedManager (reverse relationship)
             queryset = getattr(obj, self.source or field_name)
             return [self.to_native(item.pk) for item in queryset.all()]
-            # Forward relationship
+        # Forward relationship
         return [self.to_native(item.pk) for item in queryset.all()]
 
     def from_native(self, data):
@@ -916,7 +915,7 @@ class DateTimeField(WritableField):
                 # call stack.
                 warnings.warn(u"DateTimeField received a naive datetime (%s)"
                               u" while time zone support is active." % value,
-                    RuntimeWarning)
+                              RuntimeWarning)
                 default_timezone = timezone.get_default_timezone()
                 value = timezone.make_aware(value, default_timezone)
             return value