One of the side effect of my PR 14053 is that tracebacks are more verbose: the filename is now absolute rather than relative.

Currently:

$ python3 x.py 
Traceback (most recent call last):
  File "x.py", line 4, in <module>
    func()
  File "x.py", line 2, in func
    bug
NameError: name 'bug' is not defined

With my PR:

$ ./python x.py 
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/x.py", line 4, in <module>
    func()
  File "/home/vstinner/prog/python/master/x.py", line 2, in func
    bug
NameError: name 'bug' is not defined