`\',\'` or `\'as\'`? How to Assign Exceptions in Python\'s `except` Statements

Comparing ',' and 'as' in Python's except Statements

Python's try...except syntax allows for handling exceptions. However, there are two ways of assigning an exception to a variable: using a comma (',') or the 'as' keyword.

',' vs 'as' in except

In Python 3.x, using 'as' is mandatory for assigning an exception to a variable:

<code class="python">try:
    pass
except Exception as exception:
    pass</code>

In Python 2.6 (including later versions), using the 'as' syntax is strongly recommended. It is more unambiguous and provides forward compatibility with Python 3.x:

<code class="python">try:
    pass
except Exception as exception:
    pass</code>

However, in Python 2.5 and earlier, only the comma version is supported:

<code class="python">try:
    pass
except Exception, exception:
    pass</code>

Which Syntax to Use

Based on the compatibility matrix:

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