[issue37623] namedtuple integration for importlib.abc.Loader
New submission from Andrew Yurisich : I wanted to return a namedtuple from a concrete implementation of an importlib.abc.Loader base class, and wasn't able to provide a __spec__ property on the underlying class behind the namedtuple. All return values from importlib.abc.Loader#create_module need to have a __spec__ property set. Similar to the namedtuple optional argument 'module', I'd like to be able to pass in a 'spec', and add this value to result.__spec__ before returning the final result. -- components: Library (Lib) messages: 348124 nosy: Andrew Yurisich priority: normal severity: normal status: open title: namedtuple integration for importlib.abc.Loader type: enhancement versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue37623> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37623] namedtuple integration for importlib.abc.Loader
Andrew Yurisich added the comment: You're right, I was invoking the namedtuple on the same line that I was defining it, freezing it in the process. I split it to into two statements, and snuck the __spec__ attribute between the definition and the instantiation. I'll update the examples on my GitHub issue in the morning, and probably close the issue out unless I find something else that is blocking me. Thanks for the input 👍 On Fri, Jul 19, 2019, 22:08 Serhiy Storchaka wrote: > > Serhiy Storchaka added the comment: > > It is not hard to set __spec__ (as well as any other attributes) after > creating a namedtuple class. > > A = namedtuple(...) > A.__spec__ = ... > > or > > class A(namedtuple(...)): > __spec__ = ... > > __spec__ do not have anything to namedtuple. It is not like __module__ or > __doc__ setting which would benefit almost every public namedtuple class. > It is not even special for types. > > -- > nosy: +serhiy.storchaka > > ___ > Python tracker > <https://bugs.python.org/issue37623> > ___ > -- ___ Python tracker <https://bugs.python.org/issue37623> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37623] namedtuple integration for importlib.abc.Loader
Andrew Yurisich added the comment: This issue was raised due to a misunderstanding of the namedtuple creation process. After creating the fields, but before assigning them, __spec__ is trivially added to namedtuple class' definition as a property. Thanks again @serhiy.storchaka -- resolution: -> works for me stage: patch review -> resolved status: open -> closed ___ Python tracker <https://bugs.python.org/issue37623> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37623] namedtuple integration for importlib.abc.Loader
Andrew Yurisich added the comment: If anyone is interested in the progress I was able to make as a result of this discussion, feel free to check out https://github.com/captain-kark/python-module-resources/blob/d85453ff4f5022127874a5842449d95bb5eda234/module_resources/module_resources.py and leave you feedback or comments. -- ___ Python tracker <https://bugs.python.org/issue37623> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
