Why doesn't Python (error msg) tell me WHAT the actual (arg) values are ?

Wed Feb 22 15:05:21 EST 2023

 > py bug.py
 Traceback (most recent call last):
 File "C:\Usenet\bug.py", line 5, in <module>
 print( a + 12 )
 TypeError: can only concatenate str (not "int") to str
Why doesn't Python (error msg) do the obvious thing and tell me
 WHAT the actual (offending, arg) values are ?
In many cases, it'd help to know what string the var A had , when the error occurred.
 ------------ i wouldn't have to put print(a) just above, to see.
( pypy doesn't do that either, but Python makes programming (debugging) so easy that i hardly feel any inconvenience.)