What is the difference between 'except IOError as e:' and 'except

[Peng Yu]

I don't see any different between the following code in terms of
output. Are they exactly the same ('as' v.s. ',')?

try:
raise IOError('IOError')
except IOError as e:
print e

try:
raise IOError('IOError')
except IOError, e:
print e

 

[Steven D'Aprano]

I don't see any different between the following code in terms of output.
Are they exactly the same ('as' v.s. ',')?

try:
raise IOError('IOError')
except IOError as e:
print e

This is the preferred syntax. It is used in Python 2.6 and better. It is
a syntax error in Python 2.5 and older.

try:
raise IOError('IOError')
except IOError, e:
print e

This is the obsolete syntax, used in Python 2.5 and older.