weird python thing

weird.py

>>> try:
...   raise Exception("oops")
... except Exception as e:
...   print("A", e)
...   try:
...     pass # raise Exception("uh-oh")
...   except Exception as e:
...     print("B", e)
...   print("C", e)
...
A oops
C oops
>>> try:
...   raise Exception("oops")
... except Exception as e:
...   print("A", e)
...   try:
...     raise Exception("uh-oh")
...   except Exception as e:
...     print("B", e)
...   print("C", e)
...
A oops
B uh-oh
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
Exception: oops

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 9, in <module>
NameError: name 'e' is not defined