Correction of a problem with wheel package.

VERSION

@@ -0,0 +1 @@
+0.1

pyproject.toml

@@ -1,6 +1,9 @@
+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
+
 [project]
 name = "pyappengine"
-version = "0.1"
 authors = [
   { name="François Dausseur", email="fdausseur@free.fr" },
 ]
@@ -15,5 +18,10 @@ classifiers = [
 dependencies = [
     "systemd-python",
 ]
+dynamic = ["version"]
+
 [project.urls]
 "Homepage" = "https://git.beafrancois.fr/Foue/pyappengine"
+
+[tool.setuptools.dynamic]
+version = {file = ["VERSION"]}

src/appengine/__init__.py

@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 
 import os
+import sys
 import traceback
 from configparser import ConfigParser
 import logging
@@ -204,6 +205,7 @@ class CommandsLoader:
     def __init__(self, config: ConfigParser, log: logging.Handler, modpath: str):
         self.config = config
         self.modpath = modpath
+        sys.path.append(os.path.join(modpath))
         Commands.defmod = self.config["general"].get("default")
         precmd = self.config["general"].get("methods_prefix")
         if not precmd is None:
@@ -242,7 +244,11 @@ class CommandsLoader:
         self.cmods = cmds
 
     def _load_module(self, name: str):
-        module = import_module(name)
+        try:
+            module = import_module(name)
+        except ModuleNotFoundError:
+            raise Exception(f"""The module "{name}" could not be loaded.""")
+
         members = inspect.getmembers(module, inspect.isclass)
         conf = None
         if name[len(self.precmds):] in self.config.sections():