On Fri, Apr 17, 2020 at 5:06 AM <dcwhat...@gmail.com> wrote: > > On Thursday, April 16, 2020 at 2:37:42 PM UTC-4, Chris Angelico wrote: > > On Fri, Apr 17, 2020 at 2:13 AM Richard Damon <Richard> wrote: > > > I get the answer: <class '_io.TextIOWrapper'> > > > > > > So that is the name of the type that is returned, at least for that > > > call. One key thing to note is that it begins with a _, so that type is > > > actually an implementation detail, subject to change. > > > > This is somewhat true; but when the *module* begins with an > > underscore, it often means it's a C accelerator for a Python module. > > You can often find the same thing exposed in a more visible way: > > > > >>> import io > > >>> io.TextIOWrapper > > <class '_io.TextIOWrapper'> > > > > And in that location, it is fully documented: > > > > https://docs.python.org/3/library/io.html#io.TextIOWrapper > > > > The fact that it comes from the accelerator *is* an internal > > implementation detail, but the class itself is a public one. > > > > That said, though: it is still very much incorrect to type hint in > > this way. The correct type hint is a generic one: > > > > https://docs.python.org/3/library/typing.html#typing.IO > > > > And the correct way to encode this on a variable is to let type > > inference figure it out. You'd use typing.IO or typing.TextIO to > > annotate a function parameter, perhaps, but don't annotate your > > variables at all. > > > > ChrisA > > "And the correct way to encode this on a variable is to let type > inference figure it out. You'd use typing.IO or typing.TextIO to > annotate a function parameter, perhaps, but don't annotate your > variables at all." > > I don't know how many times I have to say this, but I've already decided that > the types of variables are going to be part of my code base. Same as every > other language I've programmed in, whether statically or dynamically typed. > > I don't care if it's 'incorrect' for most purposes. I'm doing it, for my > specific purpose. >
Oh! Okay then. Just annotate it as "int" - it's no more or less wrong than any other annotation :) Problem solved! ChrisA -- https://mail.python.org/mailman/listinfo/python-list
