fix: correct Python extension module naming and imports

- Updated module name in pyproject.toml to include package path
- Fixed module name in Rust extension
- Added wheel content inspection to CI for debugging
- Updated Python imports to handle module path correctly
- Fixed package structure to match Python conventions

This fixes the "No module named 'self_encryption._self_encryption'"
error by ensuring consistent module naming and proper package structure.

.github/workflows/python-publish.yml

@@ -99,7 +99,6 @@ jobs:
           ls -la dist/
           
           pip install -U pip pytest click>=8.0.0
-          # Install using find-links to handle platform tags correctly
           pip install --find-links dist/ ${{ env.PACKAGE_NAME }}
           pytest -v
       - name: Upload wheels

pyproject.toml

@@ -26,7 +26,7 @@ dependencies = [
 
 [tool.maturin]
 features = ["python"]
-module-name = "_self_encryption"
+module-name = "self_encryption._self_encryption"
 python-packages = ["self_encryption"]
 include = ["self_encryption/**/*"]
 manifest-path = "Cargo.toml"

self_encryption/__init__.py

@@ -1,5 +1,6 @@
 try:
-    from ._self_encryption import *
+    from . import _self_encryption
+    from _self_encryption import *
     from .cli import cli
 except ImportError as e:
     import sys

src/python.rs

@@ -1,7 +1,7 @@
 use pyo3::prelude::*;
 
 #[pymodule]
-fn _self_encryption(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
+fn self_encryption(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
     // Define constants directly rather than using macros
     m.add("MIN_CHUNK_SIZE", 1)?;  // From lib.rs
     m.add("MIN_ENCRYPTABLE_BYTES", 3)?;  // 3 * MIN_CHUNK_SIZE