Lint issues

Author: MomIsBestFriend

doc/source/development/contributing_code_guide.rst

@@ -24,25 +24,33 @@ For example:
 
 .. code-block:: python
 
-    cls = type(self)
+    class MyClass:
+        def __init__(self):
+            cls = type(self)
 
 **Good:**
 
 .. code-block:: python
 
-    name = type(self).__name__
+    class MyClass:
+        def __init__(self):
+            name = type(self).__name__
 
 **Bad:**
 
 .. code-block:: python
 
-    cls = self.__class__
+    class MyClass:
+        def __init__(self):
+            cls = self.__class__
 
 **Bad:**
 
 .. code-block:: python
 
-    name = self.__class__.__name__
+    class MyClass:
+        def __init__(self):
+            name = self.__class__.__name__
 
 String formatting
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