self.add(x)
Methods may reference global names in the same way as ordinary functions. The
-global scope associated with a method is the module containing the class
-definition. (The class itself is never used as a global scope.) While one
+global scope associated with a method is the module containing its
+definition. (A class is never used as a global scope.) While one
rarely encounters a good reason for using global data in a method, there are
many legitimate uses of the global scope: for one thing, functions and modules
imported into the global scope can be used by methods, as well as functions and