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Python

Posted by David Long
David Long
949 Points

"as err:" in "except ValueError as err:"

I'm assuming and my googling skills are apparently not as good as I thought but:

I don't know if I've missed it or not understanding, but if "except ValueError:" works without the "as err". From reading, watching, and playing with it, I'm assuming it just displays an error message . I would like to know when its used, what its purpose is, and if its only for displaying an error messages.

1 Answer

Dave StSomeWhere
Dave StSomeWhere
19,870 Points

Adding the as err includes the actual message. Check out this link to an explanation - does that help clear it up.

Also, here's some test code:

try:
    z = int('text')
except ValueError:
    print('got a value error on text')

try:
    x = int('text')
except ValueError as err:
    print('The actual error text is --> ', err, ' <--')

#  output is:
got a value error on text
The actual error text is -->  invalid literal for int() with base 10: 'text'  <--

Is that what you were asking?

David Long
David Long
949 Points

Exactly the answer I was looking for!