Correctly get site_packages Resource in pypi.py

Signed-off-by: Jono Yang <jyang@nexb.com>

Author: JonoYang

src/packagedcode/pypi.py

@@ -316,7 +316,7 @@ def assign_package_to_resources(cls, package, resource, codebase, package_adder)
         Assign files to package for an installed wheel. This requires a bit
         of navigation around as the files can be in multiple places.
         """
-        site_packages = resource.parent(codebase).parent(codebase).parent(codebase)
+        site_packages = resource.parent(codebase).parent(codebase)
         if not site_packages:
             return
         package_data = resource.package_data