Move py launch finder to main module

src/pipx/commands/install.py

@@ -4,7 +4,6 @@
 from pipx import constants
 from pipx.commands.common import package_name_from_spec, run_post_install_actions
 from pipx.constants import EXIT_CODE_INSTALL_VENV_EXISTS, EXIT_CODE_OK, ExitCode
-from pipx.interpreter import find_py_launcher_python
 from pipx.util import pipx_wrap
 from pipx.venv import Venv, VenvContainer
 
@@ -27,11 +26,6 @@ def install(
     # package_spec is anything pip-installable, including package_name, vcs spec,
     #   zip file, or tar.gz file.
 
-    if constants.WINDOWS and python and not Path(python).is_file():
-        py_launcher = find_py_launcher_python(python)
-        if py_launcher:
-            python = py_launcher
-
     if package_name is None:
         package_name = package_name_from_spec(
             package_spec, python, pip_args=pip_args, verbose=verbose

src/pipx/main.py

@@ -25,7 +25,7 @@
 from pipx.colors import bold, green
 from pipx.constants import WINDOWS, ExitCode
 from pipx.emojis import hazard
-from pipx.interpreter import DEFAULT_PYTHON
+from pipx.interpreter import DEFAULT_PYTHON, find_py_launcher_python
 from pipx.util import PipxError, mkdir, pipx_wrap, rmdir
 from pipx.venv import VenvContainer
 from pipx.version import __version__
@@ -181,6 +181,10 @@ def run_pipx_command(args: argparse.Namespace) -> ExitCode:  # noqa: C901
         logger.info(f"Virtual Environment location is {venv_dir}")
     if "skip" in args:
         skip_list = [canonicalize_name(x) for x in args.skip]
+    if "python" in args and WINDOWS and not Path(args.python).is_file():
+        py_launcher = find_py_launcher_python(args.python)
+        if py_launcher:
+            args.python = py_launcher
 
     if args.command == "run":
         commands.run(

tests/test_install.py

@@ -262,12 +262,3 @@ def test_install_local_archive(pipx_temp_env, monkeypatch, capsys):
     assert not run_pipx_cli(["install", "repeatme-0.1-py3-none-any.whl"])
     captured = capsys.readouterr()
     assert f"- {app_name('repeatme')}\n" in captured.out
-
-
-@pytest.mark.skipif(
-    not sys.platform.startswith("win"), reason="uses windows version format"
-)
-def test_install_with_python_windows(capsys, pipx_temp_env):
-    run_pipx_cli(["install", "pycowsay", "--python", "3.11"])
-    captured = capsys.readouterr()
-    assert "Python 3.11" in captured.out