In article <1dd863ba-09e5-439b-8669-db65f3e99...@googlegroups.com>, jongiddy <jongi...@gmail.com> wrote:
> On Sunday, 8 June 2014 02:27:42 UTC+1, Gregory Ewing wrote: > > > > Also it doesn't sit well with Python's "one obvious > > way to do it" guideline, because it means there are > > *two* equally obvious ways to call a function. > > Actually, one of the best arguments against introducing UFCS is that Python > currently provides two equivalent ways to check if an instance has an > attribute: ask-permission using hasattr and ask-forgiveness using > AttributeError. > > On the negative side, these currently equivalent (aside from performance) > techniques could give different results using UFCS, potentially breaking some > code. Why? I assume a language which promoted the global namespace to be in the attribute search path (which, as far as I can tell, is what we're talking about here) would implement hasattr and raising AttributeError in a consistent way. -- https://mail.python.org/mailman/listinfo/python-list
