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✨ Add support for PEP-593 Annotated for specifying options and arguments #584

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merged 12 commits into from
May 2, 2023

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ryangalamb
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@ryangalamb ryangalamb commented Apr 25, 2023

Implements #184

In addition to the tests/implementation, this PR also adds/updates docs_src files for all the tutorial files that can use Annotated.

Each tutorial00N.py file with Annotated is copied to tutorial00N_an.py and an _an.py version of its test is created in tests/test_tutorial. (This is modeled after the convention used in FastAPI.)

Adding the tutorial files results in a pretty massive PR, so let me know if you'd prefer those in a separate PR.

I've tested this on

  • python3.6
  • python3.7
  • python3.10

Please let me know if there's anything you'd like me to change/address πŸ™

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πŸ“ Docs preview for commit 4c8ec06 at: https://64485c5170ff0b41deceb08d--typertiangolo.netlify.app

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πŸ“ Docs preview for commit af327f1 at: https://64485e9ce8a02045f093fbe4--typertiangolo.netlify.app

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πŸ“ Docs preview for commit e4b0857 at: https://64486108fbfcff49634a32af--typertiangolo.netlify.app

A lot of the dev dependency packages weren't installable on 3.6, so I
had to remove them from the pyproject.toml.

This commit adds them back
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πŸ“ Docs preview for commit 452fc6f at: https://644863863678c34b7b416e31--typertiangolo.netlify.app

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πŸ“ Docs preview for commit 4c0d058 at: https://644867cee1091d4cc2a37c70--typertiangolo.netlify.app

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github-actions bot commented May 2, 2023

πŸ“ Docs preview for commit 83cce68 at: https://64508bba537334776a49a9a1--typertiangolo.netlify.app

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github-actions bot commented May 2, 2023

πŸ“ Docs preview for commit ba312c5 at: https://64508dfd6a3f5b73af9d5eec--typertiangolo.netlify.app

Comment on lines +134 to +150
# When used as a default, `Option` takes a default value and option names
# as positional arguments:
# `Option(some_value, "--some-argument", "-s")`
# When used in `Annotated` (ie, what this is handling), `Option` just takes
# option names as positional arguments:
# `Option("--some-argument", "-s")`
# In this case, the `default` attribute of `parameter_info` is actually
# meant to be the first item of `param_decls`.
if (
isinstance(parameter_info, OptionInfo)
and parameter_info.default is not ...
):
parameter_info.param_decls = (
cast(str, parameter_info.default),
*(parameter_info.param_decls or ()),
)
parameter_info.default = ...
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This is very clever! 😎 πŸš€

@tiangolo
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tiangolo commented May 2, 2023

Great job @ryangalamb! πŸ‘ 🍰

I tweaked a couple of things, tests, and examples. And I added all the new annotated examples to the docs. I also updated the docs to introduce the new Annotated.

This will be available in Typer 0.9.0 released in the next hours. πŸŽ‰

@tiangolo tiangolo merged commit 458a492 into tiangolo:master May 2, 2023
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2 participants