Hi Chris,
On Mon, Sep 21, 2015 at 5:44 PM, Chris Angelico
Are there any uses like this that would involve a question mark followed by some other punctuation? The main proposal would be for x?.y and similar; if "x ?? y" can't be used because of a conflict with ipython,
As far as I can tell, no `?`/`??` behave in IPython like a unary operator[1] and don't conflict. We could distinguish from any use case so far mentioned in this discussion (as far as I can tell). I just hope that the PEP will not slide in the direction of `foo?` alone being valid and equivalent to `maybe(x)`, or returning an object. I'm concern about teaching/semantics as for me `x?.y` read like "The attribute y of the help of x" so roughly `help(x).y`. The `x ?? y` is less ambiguous (imho) as it is clearly an operator with the space on each side.
I'm sure it could be changed ("x ?! y" would be cute).
Is that the WTF operator ? [2] Joke aside, ?! should not conflict either, but `!` and `!!` also have their own meaning in IPython Like the following is valid (which is a useless piece of code, but to show the principles) if you are interested in the Python syntax extension we have. my_files = ! ls ~/*.txt for i,file in enumerate(my_files): raw = !cat $file !cat $raw > {'%s-%s'%(i,file.upper())} Thanks, -- M [1]: but is not really an operator, I'm not sure what a=print? ; a =?print or ?a=print would do. [2]: http://stackoverflow.com/questions/7825055/what-does-the-c-operator-do
ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/