From: keith papa <[email protected]>
>To: Alan Gauld <[email protected]>
>Sent: Monday, 14 April 2014, 18:19
>Subject: RE: [Tutor] python errors
>
>
>
>
>>>> x = "foo" - 4
>
>
>Traceback (most recent call last):
> File "<pyshell#0>", line 1, in <module>
> x = "foo" - 4
>TypeError: unsupported operand type(s) for -: 'str' and 'int'
>>>>
>
>That's right, its a semantic error. You shouldn't be trying to subtract a
>number
from a string. It's not a meaningful thing to do,
The Python errors are not categorised into syntactic, semantic and runtime
error types, (although there is a syntax error exception). Those are computer
science concepts not explicitly exposed by Python. Python just reports an
error as above.
Alan g.
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