fix(test): get sitepackages if only one sitepackage

This fix is a result for failing linux CI builds, where getsitepackages returned a list with only 1 element, thus raising list index out of range for index [1].

upgrade/scripts/upgrade_python_package.py

@@ -92,11 +92,14 @@ def get_constraints_file_path(package_name, site_packages_dir=None):
     except (TypeError, ImportError, AttributeError):
         print("constraints error")
         print(site.getsitepackages())
-        site_packages_dir = (
-            Path(site_packages_dir)
-            if site_packages_dir
-            else Path(site.getsitepackages()[1])
-        )
+        if site_packages_dir:
+            site_packages_dir = Path(site_packages_dir)
+        else:
+            try:
+                site_packages_dir = Path(site.getsitepackages()[1])
+            except IndexError:
+                site_packages_dir = Path(site.getsitepackages()[0])
+
         print(site_packages_dir)
         package_name = package_name.replace("-", "_")
         constraints_file_path = site_packages_dir / package_name / "constraints.txt"