Why Does My Embedded Python Interpreter Fail with \'Unable to Load File System Codec\'?

Py_Initialize Failure: "Unable to Load File System Codec" Error

When attempting to use an embedded Python interpreter in a C project, you may encounter the following fatal error:

Fatal Python error: Py_Initialize: unable to load the file system codec
LookupError: no codec search functions registered: can't find encoding

This error indicates that no codec search functions have been registered, preventing the interpreter from loading the necessary codec to handle file system encoding. To resolve this issue, verify the following:

Correct PYTHONPATH and PYTHONHOME Environment Variables

Ensure that the PYTHONPATH and PYTHONHOME environment variables are not pointing to a Python 2.x installation. Refer to the bug report at http://bugs.python.org/issue11288 for more information on this issue.

By correcting the environment variables, the necessary codec functions will be registered, allowing Py_Initialize to load the file system codec and proceed successfully.

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