Missing `__init__.py` in `t5x/t5x/examples/decoder_only`

[rpeloff]

The directory t5x/t5x/examples/decoder_only is missing an __init__.py file. This means that the modules (decoder-only layers and network) cannot be imported in gin configurations.

[coreyfournier]

What version of python are you using? 3.3+ don't require it.

https://stackoverflow.com/questions/448271/what-is-init-py-for

[sinoroc]

As far as I know, __init__.py should be in every importable package except namespace packages. Even though it is true that in some (many) cases everything will work as expected without such a file. If there is no __init__.py, then technically it is considered a "namespace package", and it does have some subtle differences.

References:

• https://discuss.python.org/t/mixing-namespace-and-non-namespace-packages-bad-practice/7536 (especially a comment by Eric V. Smith, author of "PEP 420 – Implicit Namespace Packages" advising against omitting __init__.py files in non-namespace packages)
• https://stackoverflow.com/a/62992832
• https://dev.to/methane/don-t-omit-init-py-3hga
• https://discuss.python.org/t/init-py-pep-420-and-iter-modules-confusion/
• https://discuss.python.org/t/adding-contents-to-top-level-native-namespace/17726