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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ModuleNotFoundError: No module named 'encodings' when trying to use virtual environment in C# app on Ubuntu","articleBody":"**Environment:**\n\n- Ubuntu 24.04.1 LTS\n- .NET SDK 8.0.112\n- Python 3.12.3\n\n**Details:**\n\nTrying to run some Python in a C# app. This is my code: \n\n```\nRuntime.PythonDLL = @\"/usr/lib/x86_64-linux-gnu/libpython3.12.so\";\n\nstring pathToVirtualEnv = @\"/home/jadan/venvs/venv_mare\";\n\nstring path = Environment.GetEnvironmentVariable(\"PATH\")!.TrimEnd(Path.PathSeparator);\npath = string.IsNullOrEmpty(path) ? pathToVirtualEnv : path + Path.PathSeparator + pathToVirtualEnv;\nEnvironment.SetEnvironmentVariable(\"PATH\", path, EnvironmentVariableTarget.Process);\nEnvironment.SetEnvironmentVariable(\"PYTHONHOME\", pathToVirtualEnv, EnvironmentVariableTarget.Process);\nEnvironment.SetEnvironmentVariable(\"PYTHONPATH\",\n     $\"{pathToVirtualEnv}/lib/site-packages{Path.PathSeparator}\" + \n     $\"{pathToVirtualEnv}{Path.PathSeparator}\", EnvironmentVariableTarget.Process);\n\nPythonEngine.PythonPath = PythonEngine.PythonPath + Path.PathSeparator + Environment.GetEnvironmentVariable(\"PYTHONPATH\", EnvironmentVariableTarget.Process);\nPythonEngine.PythonHome = pathToVirtualEnv;\n\nPythonEngine.Initialize();\n\nusing (Py.GIL())\n{\n     dynamic np = Py.Import(\"numpy\");\n}\n```\n\nUnfortunately, this give the following error: \n\n```\nPython path configuration:\n  PYTHONHOME = '/home/jadan/venvs/venv_mare'\n  PYTHONPATH = (not set)\n  program name = 'python3'\n  isolated = 0\n  environment = 1\n  user site = 1\n  safe_path = 0\n  import site = 1\n  is in build tree = 0\n  stdlib dir = ''\n  sys._base_executable = '/usr/bin/python3'\n  sys.base_prefix = ''\n  sys.base_exec_prefix = ''\n  sys.platlibdir = 'lib'\n  sys.executable = '/usr/bin/python3'\n  sys.prefix = ''\n  sys.exec_prefix = ''\n  sys.path = [\n    '',\n    '/home/jadan/venvs/venv_mare/lib/python3.12/site-packages',\n    '/home/jadan/venvs/venv_mare',\n    '',\n  ]\nFatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding\nPython runtime state: core initialized\nModuleNotFoundError: No module named 'encodings'\n```\n\nCan someone help me?","author":{"url":"https://github.com/JelleAdan","@type":"Person","name":"JelleAdan"},"datePublished":"2025-02-12T15:57:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2548/pythonnet/issues/2548"}