[T] Add ctest label python.

Applications/Python/CMakeLists.txt

@@ -34,7 +34,9 @@ if(OGS_USE_PIP)
             COMMAND pytest -c ${PROJECT_SOURCE_DIR}/pyproject.toml
             WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
         )
-        set_tests_properties(pytest PROPERTIES LABELS "default")
+        set_tests_properties(
+            pytest PROPERTIES LABELS "default;python" COST 10
+        )
 
         add_dependencies(
             ctest

scripts/cmake/test/NotebookTest.cmake

@@ -46,7 +46,7 @@ function(NotebookTest)
     if(EXISTS ${CMAKE_CURRENT_LIST_DIR}/ProcessLib)
         current_dir_as_list(ProcessLib labels)
     endif()
-    list(APPEND labels Notebook)
+    list(APPEND labels Notebook python)
     if(DEFINED NotebookTest_LABELS)
         list(APPEND labels ${NotebookTest_LABELS})
     else()