Simplified various __eq__() methods.

django/contrib/gis/db/backends/base/adapter.py

@@ -7,9 +7,10 @@ class WKTAdapter:
         self.srid = geom.srid
 
     def __eq__(self, other):
-        if not isinstance(other, WKTAdapter):
-            return False
-        return self.wkt == other.wkt and self.srid == other.srid
+        return (
+            isinstance(other, WKTAdapter) and
+            self.wkt == other.wkt and self.srid == other.srid
+        )
 
     def __hash__(self):
         return hash((self.wkt, self.srid))

django/contrib/gis/db/backends/postgis/adapter.py

@@ -34,9 +34,7 @@ class PostGISAdapter:
             raise Exception('Error implementing psycopg2 protocol. Is psycopg2 installed?')
 
     def __eq__(self, other):
-        if not isinstance(other, PostGISAdapter):
-            return False
-        return self.ewkb == other.ewkb
+        return isinstance(other, PostGISAdapter) and self.ewkb == other.ewkb
 
     def __hash__(self):
         return hash(self.ewkb)

django/contrib/gis/gdal/geometries.py

@@ -190,10 +190,7 @@ class OGRGeometry(GDALBase):
 
     def __eq__(self, other):
         "Is this Geometry equal to the other?"
-        if isinstance(other, OGRGeometry):
-            return self.equals(other)
-        else:
-            return False
+        return isinstance(other, OGRGeometry) and self.equals(other)
 
     def __str__(self):
         "WKT is used for the string representation."

django/db/migrations/migration.py

@@ -58,9 +58,11 @@ class Migration:
         self.replaces = list(self.__class__.replaces)
 
     def __eq__(self, other):
-        if not isinstance(other, Migration):
-            return False
-        return (self.name == other.name) and (self.app_label == other.app_label)
+        return (
+            isinstance(other, Migration) and
+            self.name == other.name and
+            self.app_label == other.app_label
+        )
 
     def __repr__(self):
         return "<Migration %s.%s>" % (self.app_label, self.name)

django/db/models/query.py

@@ -1413,9 +1413,7 @@ class Prefetch:
         return None
 
     def __eq__(self, other):
-        if isinstance(other, Prefetch):
-            return self.prefetch_to == other.prefetch_to
-        return False
+        return isinstance(other, Prefetch) and self.prefetch_to == other.prefetch_to
 
     def __hash__(self):
         return hash(self.__class__) ^ hash(self.prefetch_to)

django/template/base.py

@@ -126,10 +126,8 @@ class Origin:
         return self.name
 
     def __eq__(self, other):
-        if not isinstance(other, Origin):
-            return False
-
         return (
+            isinstance(other, Origin) and
             self.name == other.name and
             self.loader == other.loader
         )

django/template/context.py

@@ -127,13 +127,12 @@ class BaseContext:
         """
         Compare two contexts by comparing theirs 'dicts' attributes.
         """
-        if isinstance(other, BaseContext):
+        return (
+            isinstance(other, BaseContext) and
             # because dictionaries can be put in different order
             # we have to flatten them like in templates
-            return self.flatten() == other.flatten()
-
-        # if it's not comparable return false
-        return False
+            self.flatten() == other.flatten()
+        )
 
 
 class Context(BaseContext):

django/utils/tree.py

@@ -64,11 +64,11 @@ class Node:
         return other in self.children
 
     def __eq__(self, other):
-        if self.__class__ != other.__class__:
-            return False
-        if (self.connector, self.negated) == (other.connector, other.negated):
-            return self.children == other.children
-        return False
+        return (
+            self.__class__ == other.__class__ and
+            (self.connector, self.negated) == (other.connector, other.negated) and
+            self.children == other.children
+        )
 
     def add(self, data, conn_type, squash=True):
         """