With PEP 562, the name __dir__ is off limits for this. Cody
On Sun, May 6, 2018, 1:54 AM Yuval Greenfield <ubershme...@gmail.com> wrote: > Hi Ideas, > > I often need to reference a script's current directory. I end up writing: > > import os > SRC_DIR = os.path.dirname(__file__) > > > But I would prefer to have a new dunder for that. I propose: "__dir__". I > was wondering if others would find it convenient to include such a shortcut. > > > Here are some examples of dirname(__file__) in prominent projects. > > https://github.com/tensorflow/models/search?l=Python&q=dirname&type= > https://github.com/django/django/search?l=Python&q=dirname&type= > https://github.com/nose-devs/nose/search?l=Python&q=dirname&type= > > Reasons not to add __dir__: > * There already is one way to do it and it's clear and fairly short. > * Avoid the bikeshed discussion of __dir__, __folder__, and other > candidates. > > Reasons to add it: > * os.path.dirname(__file__) returns the empty string when you're in the > same directory as the script. Luckily, os.path.join understands an empty > string as a ".", but this still is suboptimal for logging where it might be > surprising to find the empty string. __dir__ could be implemented to > contain a "." in that case. > * I would save about 20 characters and a line from 50% of my python > scripts. > * This is such a common construct that everyone giving it their own name > seems suboptimal for communicating. Common names include: here, path, > dirname, module_dir. > > Cheers, > > Yuval Greenfield > > P.s. nodejs has it - > https://nodejs.org/docs/latest/api/modules.html#modules_dirname also I > apologize if this has been suggested before - my googling didn't find a > previous thread. > > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ >
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