Merge pull request SCons#4448 from fazledyn-or/Fix_Improper_Method_Call_NotImplementedError

Fixed Improper Method Call: Replaced `NotImplementedError`

Author: bdbaddog

CHANGES.txt

@@ -15,6 +15,10 @@ RELEASE  VERSION/DATE TO BE FILLED IN LATER
     - Fix of the --debug=sconscript option to return exist statements when using return
       statement with stop flag enabled
 
+  From Ataf Fazledin Ahamed:
+    - Use of NotImplemented instead of NotImplementedError for special methods
+      of _ListVariable class
+
 RELEASE 4.6.0 -  Sun, 19 Nov 2023 17:22:20 -0700
 
   From Max Bachmann:

RELEASE.txt

@@ -38,9 +38,8 @@ FIXES
 IMPROVEMENTS
 ------------
 
-- List improvements that wouldn't be visible to the user in the
-  documentation:  performance improvements (describe the circumstances
-  under which they would be observed), or major code cleanups
+- Use of NotImplemented instead of NotImplementedError for special methods
+  of _ListVariable class
 
 PACKAGING
 ---------

SCons/Variables/ListVariable.py

@@ -70,22 +70,22 @@ def __init__(self, initlist=None, allowedElems=None) -> None:
         self.allowedElems = sorted(allowedElems)
 
     def __cmp__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __eq__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __ge__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __gt__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __le__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __lt__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __str__(self) -> str:
         if not len(self):