************************************************************
1. Python
---------------------- argv at line 1 ----------------------
A X
-------------------- output from line 6 --------------------
A


************************************************************
2. Python
---------------------- argv at line 2 ----------------------
B Y
-------------------- output from line 6 --------------------
B


************************************************************
3. Python
---------------------- argv at line 4 ----------------------
C Z
-------------------- output from line 6 --------------------
C


************************************************************
4. Python 2
---------------------- argv at line 1 ----------------------
A X
-------------------- output from line 6 --------------------
A


************************************************************
5. Python 2
---------------------- argv at line 2 ----------------------
B Y
-------------------- output from line 6 --------------------
B


************************************************************
6. Python 2
---------------------- argv at line 4 ----------------------
C Z
-------------------- output from line 6 --------------------
C


************************************************************
7. Python
---------------------- argv at line 1 ----------------------
A X
------------------- output from line 11 --------------------
A


************************************************************
8. Python
---------------------- argv at line 2 ----------------------
B Y
------------------- output from line 11 --------------------
B


************************************************************
9. Python
---------------------- argv at line 4 ----------------------
C Z
------------------- output from line 11 --------------------
C


************************************************************
10. Python 2
---------------------- argv at line 9 ----------------------
overwrite
------------------- output from line 11 --------------------
overwrite


************************************************************
11. Python
------------------- output from line 15 --------------------
argv reset


************************************************************