[WebToolsE2E][Aspire] Building version 9.0.0 of AspireWithPython fails with an error: " 'Aspire.Hosting.PythonAppResourceBuilderExtensions.AddPythonApp()' is for evaluation purposes only and is subject to change or removal in future updates."

[v-sherryfan]

REGRESSION INFO: worked in main branch [Aspire 9.0.0 rc 1]

INSTALL STEPS

1. Clean machine: Win11 x64 23h2 ENU
2. Install VS 17.12 Preview 4
3. Install Python [3.13.0]
4. Install Docker Desktop
5. Install azd [1.10.3]

REPRO STEPS

1. Clone aspire-samples repo, checkout to UpdateTo9GA branch
2. Add aspire 9.0.0 feed/mapping to nuget.config
3. Open samples\AspireWithPython and build

ACTUAL 'Aspire.Hosting.PythonAppResourceBuilderExtensions.AddPythonApp(Aspire.Hosting.IDistributedApplicationBuilder, string, string, string, params string[])' is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.

NOTE

• This issue does not reproduce on aspire-samples main branch [Aspire 9.0.0 rc 1]

EXPECTED Building project without any errors.

[davidfowl]

This is by design, we marked the API as experimental in Aspire 9 because it's unfinished. See https://github.com/dotnet/aspire/issues/6298

[davidfowl]

@DamianEdwards we should update the sample to ignore the warning in source.

[DamianEdwards]

When the samples are updated for 9.0 GA, we will 😄 Already happened in this branch: https://github.com/dotnet/aspire-samples/blob/b9b187e7a34fdd35e0ac36601804baef28b66c1e/samples/AspireWithPython/AspireWithPython.AppHost/Program.cs#L3

[DamianEdwards]

Fixed

[v-sherryfan]

Not repro on main branch