test_launcher fails if no Python is installed

[encukou]

If no Python is installed on a system, test_launcher fails with:

======================================================================
FAIL: test_shebang_command_in_venv (test.test_launcher.TestLauncher.test_shebang_command_in_venv)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\encukou\dev\cpython\Lib\test\test_launcher.py", line 765, in test_shebang_command_in_venv
    data = self.run_py([script], env=env)
  File "C:\Users\encukou\dev\cpython\Lib\test\test_launcher.py", line 254, in run_py
    self.assertEqual(expect_returncode, p.returncode)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 0 != 103

There's now a Buildbot that happens to have this config, see e.g. here

Linked PRs

• gh-121090: Skip test_shebang_command_in_venv if Python is not installed #121091