[Bug]: Beam's Python SDK harness boot entrypoint may fail when python is not accessible, but python3 is.

[tvalentyn]

What happened?

The code in

beam/sdks/python/container/boot.go

Line 94 in 98210d9

if err := execx.Execute("python", args...); err != nil {

assumes the Python executable is always python, which seems to not work on Ubuntu system. We should be able to detect that and handle this case gracefully.

There were also asks in the past to consider making Python path configurable . We could introduce an environment variable that controls the path to interpreter, defer to it if specified, if not - try python, if that fails, try python3.

Issue Priority

Priority: 3 (minor)

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