installer: fix optimization level (#7666)

src/poetry/installation/wheel_installer.py

@@ -94,7 +94,7 @@ class WheelInstaller:
         )
         )
 
 
     def enable_bytecode_compilation(self, enable: bool = True) -> None:
     def enable_bytecode_compilation(self, enable: bool = True) -> None:
-        self._destination.bytecode_optimization_levels = (1,) if enable else ()
+        self._destination.bytecode_optimization_levels = (-1,) if enable else ()
 
 
     def install(self, wheel: Path) -> None:
     def install(self, wheel: Path) -> None:
         with WheelFile.open(wheel) as source:
         with WheelFile.open(wheel) as source:

tests/installation/test_wheel_installer.py

@@ -77,5 +77,7 @@ def test_enable_bytecode_compilation(
     if compile:
     if compile:
         assert cache_dir.exists()
         assert cache_dir.exists()
         assert list(cache_dir.glob("*.pyc"))
         assert list(cache_dir.glob("*.pyc"))
+        assert not list(cache_dir.glob("*.opt-1.pyc"))
+        assert not list(cache_dir.glob("*.opt-2.pyc"))
     else:
     else:
         assert not cache_dir.exists()
         assert not cache_dir.exists()