Python try…except comma vs 'as' in except

Question

What is the difference between \',\' and \'as\' in except statements, eg:

try:
    pass
except Exception, exception:
    pass

and:

Answer 1

As of Python 3.7 (not sure about other versions) the 'comma' syntax is not supported any more:

Source file exception_comma.py:

try:
    result = 1/0
except Exception, e:
    print("An error occurred")
    exit(1)

exit(0)

• $ python --version --> Python 2.7.10

$ python exception_comma.py
An error occurred

• $ python3 --version --> Python 3.7.2

$ python3 exception_comma.py
  File "exception_comma.py", line 3
    except Exception, e:
                    ^
SyntaxError: invalid syntax