[Python-ideas] Definition Symmetry

[Barry Warsaw]

On Jan 31, 2013, at 11:33 PM, Andrew Grigorev wrote:

>Other strange thing is that the `raise` statement doesn't require to
>instantiate an Exception object, allowing to pass an Exception class to it.
>
>raise NotImplementedError
>raise NotImplementedError()
>
>Is there any difference between this two lines of code?

The main difference (I *think* this is still true) is that in the first
example, if the exception is caught in C it can avoid instantiation.

Cheers,
-Barry
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