On Wed, Nov 29, 2017 at 6:03 AM, Soni L. <[email protected]> wrote:
> Would be useful to pass exception-raising lambdas around.
>
> ensure(cond, lambda: raise TypeError())
>
> I guess one could instead use (and raise in ensure())
>
> ensure(cond, lambda: TypeError())
>
> But I think exception-raising lambdas would be nicer.
You can easily create a throw() function:
def throw(exc):
raise exc
Then you can use that in your lambda function:
ensure(cond, lambda: throw(TypeError("...")))
However, before you jump onto the "let's construct this lazily" idea,
benchmark the cost of creating a lambda function. It's more expensive
than a lot of people realize, and if all you save is a bit of string
formatting, you may as well just eagerly format that string.
ChrisA
_______________________________________________
Python-ideas mailing list
[email protected]
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/
