Restructure: consolidate everything inside testium/ package

Move src/lib/ → src/testium/runtime/ (internal plumbing)
Move src/testium/libs/ → src/testium/api/ (public SDK for test scripts)
Move src/py_func/ → src/testium/py_func/ (Python subprocess)
Move src/lua_func/ → src/testium/lua_func/ (Lua subprocess data)

The package now ships as a single coherent unit instead of four sibling
top-level packages (testium, lib, py_func, lua_func) — pip install
gives a clean site-packages/testium/ with no namespace pollution; .lua
files travel with the wheel via package_data; the wheel installs
cleanly and `testium -b` runs end-to-end including py_func subprocesses
and entry-point exporter plugins.

Naming:
- runtime/ (internal, no API guarantees) clearer than lib/
- api/ (public SDK consumed as `import api.testium as tm`) clearer than libs/

Imports updated en masse: from lib. → from runtime. and from libs. →
from api., plus the importlib.import_module("libs.*") strings in
test_item_console.py and test_item_runtime_plot.py. Test/example
scripts (helper_lib.py, parallel.py, post_execution.py) and the
fake_exporter test suite migrated too.

paths.py: subproc_path() now returns testium_path() — both point at
the testium package directory since the subprocesses live inside.

pyproject.toml: removed exclude=["lua_func", "py_func"] (no longer
needed), added package-data for testium.lua_func/*.lua, removed the
license classifier (PEP 639 conflict with license expression).

Subprocess isolation contract: py_func/ and lua_func/ may only import
runtime/ and their own modules — never interpreter/, main_win/, api/,
or testium/. Enforced by test/validation/items/isolation/ which runs a
py_func that statically scans subprocess source files for forbidden
imports. The contract holds today; the test prevents future drift.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CLAUDE.md

@@ -109,9 +109,28 @@ All dialog items (`dialog_image`, `dialog_question`, `dialog_references`, `dialo
 | `src/testium/interpreter/test_items/test_item_parallel.py` | `parallel` and `parallel_branch` items |
 | `src/testium/interpreter/utils/globdict.py` | Global variable dict |
 | `src/testium/interpreter/utils/termlog.py` | Terminal color output |
-| `src/lib/stdout_redirect.py` | `StdioRedirect` singleton (`stdio_redir`) |
-| `src/lib/string_queue.py` | Thread-safe string buffer used for stdout redirection |
-| `src/testium/libs/testium.py` | Public API for test scripts (`tm.*`) |
+| `src/testium/runtime/stdout_redirect.py` | `StdioRedirect` singleton (`stdio_redir`) |
+| `src/testium/runtime/string_queue.py` | Thread-safe string buffer used for stdout redirection |
+| `src/testium/api/testium.py` | Public API for test scripts (`tm.*`) |
+| `src/testium/py_func/` | Python subprocess for `py_func` items (sandboxed: imports only `runtime/` and `py_func/`) |
+| `src/testium/lua_func/` | Lua subprocess scripts for `lua_func` items |
+
+## Package layout
+
+The whole project is a single Python package under `src/testium/`:
+
+```
+src/testium/
+├── __init__.py / __main__.py
+├── runtime/      internal plumbing (jrpc, stdout_redirect, string_queue, tum_except, api)
+├── api/          public SDK exposed to test scripts (`import api.testium as tm`)
+├── interpreter/  test execution engine (NOT visible to py_func/lua_func)
+├── main_win/     GUI (NOT visible to py_func/lua_func)
+├── py_func/      subprocess code for python_func items
+└── lua_func/     subprocess scripts for lua_func items (data files)
+```
+
+`subproc_path()` and `testium_path()` both return the package directory. The py_func subprocess is launched with cwd=that directory and `python3 py_func`. The contract that `py_func/` and `lua_func/` only depend on `runtime/` (no `interpreter`, `main_win`, `api`, `testium`) is enforced by `test/validation/items/isolation/`.
 
 ## GUI icons (main_win)
 

doc/examples/dummy/post_execution.py

@@ -1,5 +1,5 @@
 
-import libs.testium as tm
+import api.testium as tm
 
 def post_exec():
     print('Success !!!!')

src/pyproject.toml

@@ -13,7 +13,6 @@ license-files = ["../LICENSE"]
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Programming Language :: Python",
-  "License :: OSI Approved :: European Union Public Licence 1.2 (EUPL 1.2)",
 ]
 dependencies = [
     "setuptools",
@@ -36,7 +35,9 @@ testium = "testium:main"
 
 [tool.setuptools.packages.find]
 where=["."]
-exclude=["lua_func", "py_func"]
+
+[tool.setuptools.package-data]
+"testium.lua_func" = ["*.lua"]
 
 [tool.setuptools.dynamic]
 version = {file = ["VERSION"]}

src/testium/api/console.py

@@ -245,7 +245,7 @@ A {classname}.close() is missing somewhere in your code !'.format(classname=type
 if not sys.platform.startswith('win'):
     # import SshConsole if pexpect is installed
     try:
-        from libs.console_ssh import SshConsole
+        from api.console_ssh import SshConsole
 
     except ImportError:
         pass

src/testium/api/console_ssh.py

@@ -8,7 +8,7 @@ import os
 import pexpect
 from pexpect import ExceptionPexpect, TIMEOUT, EOF, spawn
 
-from libs.console import Console
+from api.console import Console
 
 # Exception classes used by this module.
 

src/testium/api/raw_tcp_console.py

@@ -3,7 +3,7 @@ import sys
 import socket
 import traceback
 
-from libs.console import *
+from api.console import *
 
 class RawTCPConsole(Console):
     TYPE = 'rawtcp'

src/testium/api/runtime_plot.py

@@ -16,9 +16,9 @@ import numpy as np
 import matplotlib.dates as mdates
 from datetime import datetime, timedelta, timezone
 
-import libs.testium as tm
+import api.testium as tm
 from interpreter.test_items.test_result import TestValue
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 from interpreter.utils.py_func_exec import PyFuncExecEngine
 from interpreter.utils.api_srv import api_request
 from interpreter.utils.eval import post_evaluate

src/testium/api/termconsole.py

@@ -10,7 +10,7 @@ import os
 
 ourPath = os.path.dirname(__file__)
 sys.path.append(ourPath)
-from libs.console import (Console, BytesStore, TIMEOUT_NULL)
+from api.console import (Console, BytesStore, TIMEOUT_NULL)
 
 class TermConsole(Console):
     TYPE = 'term'

src/testium/api/testium.py

@@ -4,7 +4,7 @@ import sys
 import textwrap
 from time import monotonic
 import interpreter.utils.globdict as globdict
-from lib.tum_except import (ETUMSyntaxError)
+from runtime.tum_except import (ETUMSyntaxError)
 
 ###############################################################################
 # Console helper functions
@@ -14,7 +14,7 @@ def add_console(console):
     ''' Function which adds a ``Console`` class instance to *testium*
 
     :param console: The ``Console`` instance.
-    :type console: ``libs.console.Console`` or child class instance
+    :type console: ``api.console.Console`` or child class instance
     :return: No returned value
 
     '''
@@ -48,7 +48,7 @@ def console(name):
     :param name: The name of the ``Console`` instance.
     :type name: str
     :return: The ``Console`` or child class object
-    :rtype: ``libs.console.Console`` or child class instance
+    :rtype: ``api.console.Console`` or child class instance
     """
     cons = None
     for c in globdict.gd('console_instances', []):
@@ -65,7 +65,7 @@ def add_plot(plot: object) -> None:
     ''' Function which adds a ``RuntimePlot`` class instance to *testium*
 
     :param plot: The ``RuntimePlot`` instance.
-    :type plot: ``libs.runtime_plot.RuntimePlot`` or child class instance
+    :type plot: ``api.runtime_plot.RuntimePlot`` or child class instance
     :return: No returned value
 
     '''
@@ -99,7 +99,7 @@ def plot(name: str) -> object:
     :param name: The name of the ``RuntimePlot`` instance.
     :type name: str
     :return: The ``RuntimePlot`` or child class object
-    :rtype: ``libs.runtime_plot.RuntimePlot`` or child class instance
+    :rtype: ``api.runtime_plot.RuntimePlot`` or child class instance
     """
     plot = None
     for g in globdict.gd('plot_instances', []):

src/testium/interpreter/batch.py

@@ -9,8 +9,8 @@ from multiprocessing import Queue
 
 from interpreter.process import TestProcess
 from interpreter.utils.test_ctrl import TestSetController
-from lib.tum_except import ETUMFileError, ETUMRuntimeError
-from lib.stdout_redirect import stdio_redir
+from runtime.tum_except import ETUMFileError, ETUMRuntimeError
+from runtime.stdout_redirect import stdio_redir
 
 
 class Batch:

src/testium/interpreter/process.py

@@ -6,9 +6,9 @@ from threading import Thread
 from time import sleep
 import copy
 
-from lib.string_queue import StringQueue
-from lib.tum_except import print_exception, ETUMRuntimeError, ETUMSyntaxError
-import libs.testium as tm
+from runtime.string_queue import StringQueue
+from runtime.tum_except import print_exception, ETUMRuntimeError, ETUMSyntaxError
+import api.testium as tm
 import interpreter.utils.globdict as globdict
 from interpreter.utils.params import expanse
 from interpreter.utils.test_ctrl import TestSetController
@@ -26,7 +26,7 @@ from interpreter.utils.test_init import (
 from interpreter.utils.constants import TestItemType as cst_type
 from interpreter.test_set import TestSet
 from interpreter.utils.include import TUMLoader, TUMLoaderNoIncludes, TUMLoaderRawIncludes
-from lib.stdout_redirect import stdio_redir
+from runtime.stdout_redirect import stdio_redir
 from interpreter.utils.template import template_to_test
 from interpreter.utils.yaml_load import yaml_load
 from interpreter.utils.py_eval import eval_process_init

src/testium/interpreter/test_items/item_actions/__init__.py

@@ -1,4 +1,4 @@
-from lib.tum_except import ETUMSyntaxError
+from runtime.tum_except import ETUMSyntaxError
 from interpreter.test_items.test_item import TestItem, test_run, test_data
 from interpreter.test_items.test_result import TestResult, TestValue
 from interpreter.test_items.item_actions.action import TestItemAction

src/testium/interpreter/test_items/test_item.py

@@ -3,11 +3,11 @@ from time import sleep
 import yaml
 from copy import deepcopy
 from interpreter.test_items.test_result import TestResult, TestValue
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.params import TestItemParams
 from interpreter.utils.constants import TestItemType as cst_type
 from interpreter.utils.eval import eval_to_boolean, evaluate, post_evaluate
-from lib.tum_except import ETUMSyntaxError, item_load_context
+from runtime.tum_except import ETUMSyntaxError, item_load_context
 
 LOG_TEST_STOP = '<----- step "{}" finished'
 LOG_TEST_START = '-----> step "{}" started'

src/testium/interpreter/test_items/test_item_check.py

@@ -1,8 +1,8 @@
 
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import TestValue
-from lib.tum_except import ETUMSyntaxError, item_load_context
-import libs.testium as tm
+from runtime.tum_except import ETUMSyntaxError, item_load_context
+import api.testium as tm
 from interpreter.utils.constants import TestItemType as cst
 from interpreter.utils.eval import evaluate
 

src/testium/interpreter/test_items/test_item_choices_dialog.py

@@ -2,8 +2,8 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
-import libs.testium as tm
+from runtime.tum_except import item_load_context
+import api.testium as tm
 
 
 class TestItemChoicesDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_item_console.py

@@ -3,9 +3,9 @@ import os
 import importlib
 import traceback
 
-import libs.testium as tm
-from lib.tum_except import ETUMSyntaxError
-from lib.stdout_redirect import stdio_redir
+import api.testium as tm
+from runtime.tum_except import ETUMSyntaxError
+from runtime.stdout_redirect import stdio_redir
 from interpreter.test_items.test_item import test_run
 from interpreter.test_items.item_actions import TestItemActions
 from interpreter.test_items.item_actions.action import TestItemAction
@@ -345,17 +345,17 @@ class TestItemConsole(TestItemActions):
         self.actions_token = {}
 
         global console
-        console = importlib.import_module("libs.console")
+        console = importlib.import_module("api.console")
 
         if not sys.platform.startswith("win"):
             global console_ssh
-            console_ssh = importlib.import_module("libs.console_ssh")
+            console_ssh = importlib.import_module("api.console_ssh")
 
         global termconsole
-        termconsole = importlib.import_module("libs.termconsole")
+        termconsole = importlib.import_module("api.termconsole")
 
         global raw_tcp_console
-        raw_tcp_console = importlib.import_module("libs.raw_tcp_console")
+        raw_tcp_console = importlib.import_module("api.raw_tcp_console")
 
         self.actions_token["console_name"] = self._prms.getParam(
             "console_name", required=True

src/testium/interpreter/test_items/test_item_cycle.py

@@ -1,11 +1,11 @@
 import traceback
 
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError
 from interpreter.utils.py_func_exec import PyFuncExecEngine
 from interpreter.utils.api_srv import api_request
 from interpreter.test_items.test_item import TestItem, test_run
 from interpreter.test_items.test_result import TestResult, TestValue
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.params import TestItemParams
 from interpreter.utils.constants import TestItemType as cst
 

src/testium/interpreter/test_items/test_item_dialog_base.py

@@ -1,6 +1,6 @@
 import multiprocessing
 
-import libs.testium as tm
+import api.testium as tm
 from interpreter.test_items.test_item import TestItem
 
 

src/testium/interpreter/test_items/test_item_git.py

@@ -1,7 +1,7 @@
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import (TestValue)
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import ETUMParamError, ETUMSyntaxError
+from runtime.tum_except import ETUMParamError, ETUMSyntaxError
 import interpreter.utils.version as git
 
 class TestItemGit(TestItem):

src/testium/interpreter/test_items/test_item_group.py

@@ -1,8 +1,8 @@
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import (TestResult, TestValue)
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import ETUMSyntaxError
-import libs.testium as tm
+from runtime.tum_except import ETUMSyntaxError
+import api.testium as tm
 
 class TestItemGroup(TestItem):
     def __init__(self, dict_cycle, parent = None, status_queue=None, filename=""):

src/testium/interpreter/test_items/test_item_image_dialog.py

@@ -4,8 +4,8 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
-import libs.testium as tm
+from runtime.tum_except import item_load_context
+import api.testium as tm
 
 
 class TestItemImageDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_item_json_rpc/__init__.py

@@ -2,7 +2,7 @@ import sys
 import traceback
 from random import randint
 
-from lib.tum_except import ETUMSyntaxError
+from runtime.tum_except import ETUMSyntaxError
 from interpreter.test_items.test_item import TestItem, test_run
 from interpreter.test_items.test_result import TestResult, TestValue
 

src/testium/interpreter/test_items/test_item_json_rpc/jsonrpc_adapters.py

@@ -3,9 +3,9 @@ import socket
 import re
 import struct
 
-from lib.tum_except import ETUMRuntimeError
-import libs.testium as tm
-from libs.console import Console
+from runtime.tum_except import ETUMRuntimeError
+import api.testium as tm
+from api.console import Console
 
 
 def is_ip_address(address):

src/testium/interpreter/test_items/test_item_let.py

@@ -5,8 +5,8 @@ import time
 
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import (TestResult, TestValue)
-from lib.tum_except import ETUMSyntaxError, item_load_context
-import libs.testium as tm
+from runtime.tum_except import ETUMSyntaxError, item_load_context
+import api.testium as tm
 from interpreter.utils.constants import TestItemType as cst
 
 class TestItemLet(TestItem):

src/testium/interpreter/test_items/test_item_lua_func.py

@@ -4,10 +4,10 @@ import traceback
 import pprint
 import textwrap
 
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
 from interpreter.test_items.test_item import TestItem, test_run
 from interpreter.test_items.test_result import TestValue
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.lua_func_exec import LuaFuncExecEngine
 from interpreter.utils.api_srv import api_request
 from interpreter.utils.constants import TestItemType as cst

src/testium/interpreter/test_items/test_item_msg_dialog.py

@@ -5,7 +5,7 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
+from runtime.tum_except import item_load_context
 
 
 class TestItemMsgDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_item_note_dialog.py

@@ -2,8 +2,8 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
-import libs.testium as tm
+from runtime.tum_except import item_load_context
+import api.testium as tm
 
 
 class TestItemNoteDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_item_parallel.py

@@ -6,9 +6,9 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestResult, TestValue
 from interpreter.utils.constants import TestItemType as cst
 from interpreter.utils.eval import eval_to_boolean
-from lib.tum_except import ETUMSyntaxError
-from lib.string_queue import StringQueue
-from lib.stdout_redirect import stdio_redir
+from runtime.tum_except import ETUMSyntaxError
+from runtime.string_queue import StringQueue
+from runtime.stdout_redirect import stdio_redir
 
 
 class TestItemParallelBranch(TestItemContainer):

src/testium/interpreter/test_items/test_item_py_func.py

@@ -4,10 +4,10 @@ import time
 import pprint
 import textwrap
 
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
 from interpreter.test_items.test_item import TestItem, test_run
 from interpreter.test_items.test_result import TestValue
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.py_func_exec import PyFuncExecEngine
 from interpreter.utils.api_srv import api_request
 from interpreter.utils.constants import TestItemType as cst

src/testium/interpreter/test_items/test_item_question_dialog.py

@@ -2,7 +2,7 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
+from runtime.tum_except import item_load_context
 
 
 class TestItemQuestionDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_item_report.py

@@ -1,7 +1,7 @@
 
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import (TestValue)
-from lib.tum_except import ETUMSyntaxError
+from runtime.tum_except import ETUMSyntaxError
 from interpreter.utils.constants import TestItemType as cst
 from interpreter.test_report.test_report import Export
 

src/testium/interpreter/test_items/test_item_run.py

@@ -8,9 +8,9 @@ import traceback
 
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import (TestValue)
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
 
 
 def nowInBetween(start, end):

src/testium/interpreter/test_items/test_item_runtime_plot.py

@@ -3,8 +3,8 @@ import importlib
 import traceback
 from functools import wraps
 
-import libs.testium as tm
-from lib.tum_except import ETUMSyntaxError, item_load_context
+import api.testium as tm
+from runtime.tum_except import ETUMSyntaxError, item_load_context
 from interpreter.test_items.test_item import TestItem, test_run
 from interpreter.test_items.test_result import TestResult, TestValue
 from interpreter.test_items.item_actions import TestItemActions
@@ -235,4 +235,4 @@ class TestItemPlot(TestItemActions):
         self.actions_token = self._prms.getParam("plot_name", required=True)
 
         global runtime_plot
-        runtime_plot = importlib.import_module("libs.runtime_plot")
+        runtime_plot = importlib.import_module("api.runtime_plot")

src/testium/interpreter/test_items/test_item_sleep.py

@@ -3,11 +3,11 @@ from time import sleep
 from datetime import timedelta
 from multiprocessing import Process, Pipe
 
-import libs.testium as tm
+import api.testium as tm
 from interpreter.test_items.test_item import (TestItem, test_run)
 from interpreter.test_items.test_result import (TestValue)
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError, item_load_context
 
 class TestItemSleep(TestItem):
     """sleep item usage.

src/testium/interpreter/test_items/test_item_tested_references.py

@@ -2,8 +2,8 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
-import libs.testium as tm
+from runtime.tum_except import item_load_context
+import api.testium as tm
 
 
 class TestItemTestedRefsDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_item_unittest.py

@@ -4,14 +4,14 @@ from unittest import (TestCase, TestSuite, TextTestRunner,
     TextTestResult)
 from unittest.loader import defaultTestLoader
 
-import libs.testium as tm
-from lib.tum_except import (ETUMFileError)
+import api.testium as tm
+from runtime.tum_except import (ETUMFileError)
 from interpreter.utils.modules import load_source
 from interpreter.test_items.test_item import (TestItem, test_run, LOG_TEST_STOP, LOG_TEST_START)
 from interpreter.test_items.test_result import (TestResult, TestValue)
 from interpreter.test_items.test_item import test_data
 from interpreter.utils.constants import TestItemType as cst
-from lib.stdout_redirect import stdio_redir
+from runtime.stdout_redirect import stdio_redir
 
 class UnittestResult(TextTestResult):
     """Test result adapted for unittest test"""

src/testium/interpreter/test_items/test_item_value_dialog.py

@@ -2,8 +2,8 @@ from interpreter.test_items.test_item import test_run
 from interpreter.test_items.test_result import TestValue
 from interpreter.test_items.test_item_dialog_base import TestItemDialogBase, _is_text_mode, _is_interactive
 from interpreter.utils.constants import TestItemType as cst
-from lib.tum_except import item_load_context
-import libs.testium as tm
+from runtime.tum_except import item_load_context
+import api.testium as tm
 
 
 class TestItemValueDialog(TestItemDialogBase):

src/testium/interpreter/test_items/test_result.py

@@ -1,4 +1,4 @@
-from lib.tum_except import (ETUMRuntimeError)
+from runtime.tum_except import (ETUMRuntimeError)
 
 from datetime import datetime
 from enum import Enum

src/testium/interpreter/test_report/report_export.py

@@ -3,7 +3,7 @@ import os
 import interpreter.test_report.test_report as tr
 from interpreter.utils.paths import prepare_file_to_save
 import interpreter.utils.constants as cst
-import libs.testium as tm
+import api.testium as tm
 
 
 class ReportExport:

src/testium/interpreter/test_report/report_export_junit.py

@@ -1,5 +1,5 @@
 from junit_xml import (TestSuite, TestCase)
-import libs.testium as tm
+import api.testium as tm
 from interpreter.test_items.test_result import (TestValue)
 import interpreter.test_report.report_export as rpe
 import interpreter.test_report.test_report as tr

src/testium/interpreter/test_report/test_report.py

@@ -4,8 +4,8 @@ from functools import wraps
 import sqlite3
 from time import (time, sleep)
 import traceback
-from lib.tum_except import (ETUMRuntimeError, ETUMSyntaxError)
-from lib.stdout_redirect import stdio_redir
+from runtime.tum_except import (ETUMRuntimeError, ETUMSyntaxError)
+from runtime.stdout_redirect import stdio_redir
 from interpreter.utils.params import (expanse)
 from interpreter.utils.paths import prepare_file_to_save
 import interpreter.utils.constants as cst

src/testium/interpreter/test_set.py

@@ -2,13 +2,13 @@ import os
 import datetime
 from queue import Queue
 from interpreter.utils.params import expanse
-import libs.testium as tm
-from lib.tum_except import ETUMSyntaxError
+import api.testium as tm
+from runtime.tum_except import ETUMSyntaxError
 import interpreter.utils.settings as prefs
 from interpreter.test_report.test_report import TestReport
 from interpreter.utils.py_func_exec import PyFuncExecEngine
 from interpreter.utils.api_srv import api_request
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 from interpreter.utils.constants import TestItemType as cst_type
 import interpreter.utils.constants as cst
 from interpreter.utils.constants import TEST_TYPE_LIST

src/testium/interpreter/utils/api_srv.py

@@ -1,6 +1,6 @@
-from lib.api import SUPPORTED_API
+from runtime.api import SUPPORTED_API
 
-import libs.testium as tm
+import api.testium as tm
 
 # Fill the api_dict with the function of tm
 api_dict = {k: getattr(tm, k) for k in SUPPORTED_API if hasattr(tm, k)}

src/testium/interpreter/utils/eval.py

@@ -1,6 +1,6 @@
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.py_eval import eval_exec
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError
 
 
 def evaluate(val, **replacement_dict):

src/testium/interpreter/utils/include.py

@@ -1,8 +1,8 @@
 import yaml
 import os.path
-import libs.testium as tm
+import api.testium as tm
 from interpreter.utils.params import expanse
-from lib.tum_except import ETUMFileError
+from runtime.tum_except import ETUMFileError
 from interpreter.utils.template import template_to_test
 from copy import copy
 from interpreter.utils.globdict import global_dict

src/testium/interpreter/utils/lua_func_exec.py

@@ -1,6 +1,6 @@
 
 from interpreter.utils.lua_process import LuaProcessBase
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 from interpreter.test_items.test_result import TestValue
 
 

src/testium/interpreter/utils/lua_process.py

@@ -4,10 +4,10 @@ import shutil
 import subprocess
 import socket
 
-import libs.testium as tm
-from lib.jrpc import JsonRpcClient
+import api.testium as tm
+from runtime.jrpc import JsonRpcClient
 from interpreter.utils.paths import subproc_path
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 from interpreter.utils.paths import sys_app_path_lin, sys_app_path_win
 
 def _lua_version(path: str):

src/testium/interpreter/utils/params.py

@@ -1,5 +1,5 @@
 import interpreter.utils.globdict as globdict
-from lib.tum_except import ETUMSyntaxError, ETUMRuntimeError
+from runtime.tum_except import ETUMSyntaxError, ETUMRuntimeError
 
 glob_eval_func = None
 

src/testium/interpreter/utils/paths.py

@@ -5,7 +5,7 @@ from pathlib import Path
 import testium
 from interpreter.utils.params import expanse
 import subprocess
-import libs.testium as tm
+import api.testium as tm
 
 
 def testium_path():
@@ -18,12 +18,9 @@ def testium_path():
     return str(Path(tp).parent.resolve())
 
 def subproc_path():
-    if getattr(sys, 'frozen', False):
-        # Exécuté depuis le .exe
-        return sys._MEIPASS
-
-    tp = inspect.getfile(inspect.getmodule(testium))
-    return str(Path(tp).parent.parent.resolve())
+    # py_func and lua_func now live inside the testium package; their cwd
+    # is the testium package root, same as testium_path().
+    return testium_path()
 
 def prepare_file_to_save(file_name, file_ext=""):
     iname = file_name

src/testium/interpreter/utils/py_eval.py

@@ -1,6 +1,6 @@
 from interpreter.utils.py_process import PyProcessBase
-from lib.tum_except import ETUMRuntimeError
-import libs.testium as tm
+from runtime.tum_except import ETUMRuntimeError
+import api.testium as tm
 
 
 eval_process = None

src/testium/interpreter/utils/py_func_exec.py

@@ -1,6 +1,6 @@
 
 from interpreter.utils.py_process import PyProcessBase
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 from interpreter.test_items.test_result import TestValue
 
 

src/testium/interpreter/utils/py_process.py

@@ -3,10 +3,10 @@ import shutil
 import sys
 import subprocess
 import socket
-from lib.jrpc import JsonRpcClient
-import libs.testium as tm
+from runtime.jrpc import JsonRpcClient
+import api.testium as tm
 from interpreter.utils.paths import sys_app_path_lin, sys_app_path_win
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 from interpreter.utils.paths import testium_path, subproc_path
 
 

src/testium/interpreter/utils/settings.py

@@ -2,7 +2,7 @@ import os
 import configparser
 import json
 import platform
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 
 SettingsCompany = 'Testium'
 SettingsApplication = 'testium'

src/testium/interpreter/utils/template.py

@@ -4,7 +4,7 @@ from jinja2 import Template
 from jinja2.exceptions import TemplateSyntaxError, TemplateError, UndefinedError
 from tempfile import TemporaryFile
 from interpreter.utils.yaml_load import print_yaml
-from lib.tum_except import ETUMSyntaxError
+from runtime.tum_except import ETUMSyntaxError
 
 
 def template_to_test(filename: str, params: list):

src/testium/interpreter/utils/test_ctrl.py

@@ -1,6 +1,6 @@
 from multiprocessing import Queue
 from queue import Empty
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 
 
 class TestSetController:

src/testium/interpreter/utils/test_init.py

@@ -7,13 +7,13 @@ import yaml
 import copy
 
 from interpreter.utils.constants import TestItemType as cst
-import libs.testium as tm
+import api.testium as tm
 import interpreter.utils.globdict as globdict
 import interpreter.utils.settings as prefs
 from interpreter.utils.paths import testium_path
 from interpreter.utils.yaml_load import yaml_load
 from interpreter.utils import clear_recursively
-from lib.tum_except import ETUMSyntaxError
+from runtime.tum_except import ETUMSyntaxError
 from interpreter.utils.params import expanse, eval_func_init
 from interpreter.utils.eval import evaluate
 from interpreter.utils.version import (

src/testium/interpreter/utils/version.py

@@ -3,7 +3,7 @@ import sys
 from importlib import import_module
 
 import interpreter.utils.settings as prefs
-import libs.testium as tm
+import api.testium as tm
 
 _cached_versions = {}
 

src/testium/interpreter/utils/yaml_load.py

@@ -1,8 +1,8 @@
 from yaml.parser import ParserError
 from yaml import load, Loader
 from yaml.scanner import ScannerError
-from libs.testium import print_debug
-from lib.tum_except import ETUMSyntaxError
+from api.testium import print_debug
+from runtime.tum_except import ETUMSyntaxError
 import io
 
 

src/testium/main_win/test_file_manager.py

@@ -10,7 +10,7 @@ from interpreter.process import TestProcess
 from interpreter.utils.test_ctrl import TestSetController
 from main_win.test_controller_service import TestControllerService
 import interpreter.utils.settings as prefs
-from lib.tum_except import ETUMFileError, ETUMRuntimeError
+from runtime.tum_except import ETUMFileError, ETUMRuntimeError
 
 
 class TestFileManager:

src/testium/main_win/test_tree.py

@@ -10,12 +10,12 @@ from PySide6.QtGui import (QFont, QFontInfo)
 from time import (time)
 
 from main_win.test_tree_items.common import (TEST_COLS, TEST_COLS_WITH_TIME)
-from lib.tum_except import (ETUMFileError, ETUMSyntaxError)
+from runtime.tum_except import (ETUMFileError, ETUMSyntaxError)
 from main_win.test_controller_service import TestControllerService
 from main_win.test_tree_items.test_tree_item import make_tree_item
 
 from interpreter.test_items.test_result import (TestValue)
-import libs.testium as tm
+import api.testium as tm
 import interpreter.utils.settings as prefs
 from interpreter.utils.constants import TestItemType as cst
 from interpreter.utils.icons import icon_prefix

src/testium/main_win/test_tree_items/test_tree_item.py

@@ -5,7 +5,7 @@ from PySide6.QtGui import (QIcon, QPixmap, QBrush, QColor)
 from PySide6.QtCore import Qt
 from PySide6.QtWidgets import (QTreeWidgetItem)
 from interpreter.utils.icons import icon_prefix
-from libs.testium import print_warn
+from api.testium import print_warn
 
 # Maps item_name (from TestItemType.item_name) to visual config.
 # Keys: icon (required), icon_on (optional 2nd state), expanded, unfoldable, no_breakpoint

src/testium/main_win/testium_win.py

@@ -30,7 +30,7 @@ from main_win.f1_win.d_f1_win import DialogF1
 from main_win.test_tree import QTestTree
 
 from main_win.test_run.thread_output import ThreadTestOutput
-from lib.string_queue import StringQueue
+from runtime.string_queue import StringQueue
 from interpreter.process import TestProcess
 from interpreter.utils.test_ctrl import TestSetController
 from interpreter.utils.icons import icon_prefix
@@ -38,14 +38,14 @@ from interpreter.utils.icons import icon_prefix
 from main_win.test_run.outlog import OutLog
 from main_win.test_run.test_run import ThreadTestStatus
 import interpreter.utils.settings as prefs
-from lib.stdout_redirect import stdio_redir
-import libs.testium as tm
+from runtime.stdout_redirect import stdio_redir
+import api.testium as tm
 from interpreter.utils.test_init import (
     env_init,
     locate_report_file,
 )
 from interpreter.utils.version import get_testium_version
-from lib.tum_except import ETUMFileError, ETUMRuntimeError
+from runtime.tum_except import ETUMFileError, ETUMRuntimeError
 from main_win.test_controller_service import TestControllerService
 from main_win.test_runner import TestRunner, TestState
 from main_win.test_file_manager import TestFileManager

src/testium/main_win/text_log.py

@@ -6,7 +6,7 @@ from PySide6.QtGui import QCursor, QDesktopServices, QFont
 
 from main_win.text_log_highlighter import TextLogHighlighter
 
-import libs.testium as tm
+import api.testium as tm
 
 class QTextLog(QPlainTextEdit):
     def __init__(self, parent):

src/testium/py_func/__init__.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 import multiprocessing
 from py_func.tm import _init_api, _remote_print
-from lib.stdout_redirect import stdio_redir
+from runtime.stdout_redirect import stdio_redir
 
 
 class TcpStdOut:

src/testium/py_func/func_call.py

@@ -5,7 +5,7 @@ from pathlib import Path
 import importlib
 import traceback
 
-from lib.tum_except import ETUMRuntimeError, ETUMSyntaxError
+from runtime.tum_except import ETUMRuntimeError, ETUMSyntaxError
 from py_func import tm
 
 

src/testium/py_func/handle.py

@@ -7,8 +7,8 @@ import math
 import json
 import traceback
 
-from lib.jrpc import JsonRpcSrv
-from lib.tum_except import ETUMRuntimeError, print_exception
+from runtime.jrpc import JsonRpcSrv
+from runtime.tum_except import ETUMRuntimeError, print_exception
 import py_func.tm as tm
 from py_func.func_call import func_exec
 

src/testium/py_func/tm.py

@@ -2,8 +2,8 @@
 import json
 import sys
 from py_func.handle import FuncHandler
-from lib.tum_except import ETUMRuntimeError
-from lib.api import SUPPORTED_API
+from runtime.tum_except import ETUMRuntimeError
+from runtime.api import SUPPORTED_API
 
 thismodule = sys.modules[__name__]
 _func_call_thread = None

src/testium/runtime/jrpc.py

@@ -6,11 +6,11 @@ import itertools
 from time import sleep
 from typing import Callable, Any
 try:
-    import libs.testium as tm
+    import api.testium as tm
 except:
     import py_func.tm as tm
 
-from lib.tum_except import ETUMRuntimeError
+from runtime.tum_except import ETUMRuntimeError
 
 """Lightweight JSON-RPC 2.0 helpers over TCP sockets.
 

src/testium/runtime/stdout_redirect.py

@@ -1,7 +1,7 @@
 import sys
 import threading
 from threading import (Thread, Event)
-from lib.string_queue import StringQueue
+from runtime.string_queue import StringQueue
 from time import (sleep)
 
 

test/robustness/console serial/terminal_bug_reproducer.py

@@ -1,4 +1,4 @@
-import libs.testium as tm
+import api.testium as tm
 
 def RetreiveData(console_name):
     print("--------------- retrieving data ---------------")

test/robustness/console terminal/terminal_bug_reproducer.py

@@ -1,4 +1,4 @@
-import libs.testium as tm
+import api.testium as tm
 
 def RetreiveData(console_name):
     print("--------------- retrieving data ---------------")

test/validation/items/common/helper_lib.py

@@ -1,4 +1,4 @@
-import libs.testium as libtm
+import api.testium as libtm
 
 
 def check_os(expected_os):

test/validation/items/isolation/check_isolation.py

@@ -0,0 +1,65 @@
+"""Static check that py_func/ and lua_func/ subprocess code does not depend
+on testium internals. The contract is:
+
+    py_func/*.py  may import:  py_func.*, runtime.*, plus stdlib/3rd-party
+    lua_func/*.lua may require: lua_func/<own files>, plus lua stdlib
+
+Forbidden top-level modules: interpreter, main_win, api, testium.
+"""
+
+import ast
+import os
+import re
+
+FORBIDDEN_PY = {"interpreter", "main_win", "api", "testium"}
+FORBIDDEN_LUA = {"interpreter", "main_win", "api", "testium"}
+
+
+def _collect_py_imports(path):
+    with open(path, "r", encoding="utf-8") as f:
+        tree = ast.parse(f.read(), filename=path)
+    out = set()
+    for node in ast.walk(tree):
+        if isinstance(node, ast.Import):
+            for n in node.names:
+                out.add(n.name.split(".")[0])
+        elif isinstance(node, ast.ImportFrom):
+            if node.level == 0 and node.module:
+                out.add(node.module.split(".")[0])
+    return out
+
+
+def _collect_lua_requires(path):
+    with open(path, "r", encoding="utf-8") as f:
+        text = f.read()
+    return {m.split(".")[0] for m in re.findall(r'require\s*\(?\s*["\']([^"\']+)["\']', text)}
+
+
+def check_isolation(testium_dir):
+    failures = []
+
+    py_dir = os.path.join(testium_dir, "py_func")
+    for root, _, files in os.walk(py_dir):
+        for f in files:
+            if not f.endswith(".py"):
+                continue
+            p = os.path.join(root, f)
+            leaks = _collect_py_imports(p) & FORBIDDEN_PY
+            if leaks:
+                failures.append(f"py_func/{os.path.relpath(p, py_dir)} leaks: {sorted(leaks)}")
+
+    lua_dir = os.path.join(testium_dir, "lua_func")
+    for root, _, files in os.walk(lua_dir):
+        for f in files:
+            if not f.endswith(".lua"):
+                continue
+            p = os.path.join(root, f)
+            leaks = _collect_lua_requires(p) & FORBIDDEN_LUA
+            if leaks:
+                failures.append(f"lua_func/{os.path.relpath(p, lua_dir)} leaks: {sorted(leaks)}")
+
+    if failures:
+        for line in failures:
+            print(f"  - {line}")
+        return False
+    return True

test/validation/items/isolation/param.yaml

@@ -0,0 +1 @@
+no_param: Null

test/validation/items/isolation/test.tum

@@ -0,0 +1,8 @@
+- py_func:
+    name: py_func/lua_func do not depend on testium internals
+    file: $(test_path)$(psep)check_isolation.py
+    func_name: check_isolation
+    key: $(test)_PASS
+    param:
+        - $(testium_path)
+    expected_result: True

test/validation/items/parallel/parallel.py

@@ -1,5 +1,5 @@
 import time
-import libs.testium as tm
+import api.testium as tm
 
 
 def sleep_func(duration):