STYLE: Avoid difficult to read anit-pattern

Test for object identity should be 'is not'
https://www.flake8rules.com/rules/E714.html

Wrapping/Generators/Python/itkTemplate.py

@@ -321,7 +321,7 @@ def __getitem__(self, parameters):
         """
 
         parameters_type = type(parameters)
-        if not parameters_type is tuple and not parameters_type is list:
+        if (parameters_type is not tuple) and (parameters_type is not list):
             # parameters is a single element.
             # include it in a list to manage the 2 cases in the same way
             parameters = [parameters]