examples: export __doc__ in example projects

examples/maturin-starter/maturin_starter/__init__.py

@@ -1,5 +1,9 @@
 # import the contents of the Rust library into the Python extension
+# optional: include the documentation from the Rust module
 from .maturin_starter import *
+from .maturin_starter import __all__, __doc__
+
+__all__ = __all__ + ["PythonClass"]
 
 
 class PythonClass:

examples/maturin-starter/src/lib.rs

@@ -19,6 +19,7 @@ impl ExampleClass {
     }
 }
 
+/// An example module implemented in Rust using PyO3.
 #[pymodule]
 fn maturin_starter(py: Python, m: &PyModule) -> PyResult<()> {
     m.add_class::<ExampleClass>()?;

examples/maturin-starter/tests/test_maturin_starter.py

@@ -1,4 +1,4 @@
-from maturin_starter import PythonClass, ExampleClass
+from maturin_starter import ExampleClass, PythonClass
 
 
 def test_python_class() -> None:
@@ -9,3 +9,11 @@ def test_python_class() -> None:
 def test_example_class() -> None:
     example = ExampleClass(value=11)
     assert example.value == 11
+
+
+def test_doc() -> None:
+    import maturin_starter
+
+    assert (
+        maturin_starter.__doc__ == "An example module implemented in Rust using PyO3."
+    )

examples/setuptools-rust-starter/setuptools_rust_starter/__init__.py

@@ -1,5 +1,9 @@
 # import the contents of the Rust library into the Python extension
+# optional: include the documentation from the Rust module
 from ._setuptools_rust_starter import *
+from ._setuptools_rust_starter import __all__, __doc__
+
+__all__ = __all__ + ["PythonClass"]
 
 
 class PythonClass:

examples/setuptools-rust-starter/src/lib.rs

@@ -19,6 +19,7 @@ impl ExampleClass {
     }
 }
 
+/// An example module implemented in Rust using PyO3.
 #[pymodule]
 fn _setuptools_rust_starter(py: Python, m: &PyModule) -> PyResult<()> {
     m.add_class::<ExampleClass>()?;

examples/setuptools-rust-starter/tests/test_setuptools_rust_starter.py

@@ -1,4 +1,4 @@
-from setuptools_rust_starter import PythonClass, ExampleClass
+from setuptools_rust_starter import ExampleClass, PythonClass
 
 
 def test_python_class() -> None:
@@ -9,3 +9,12 @@ def test_python_class() -> None:
 def test_example_class() -> None:
     example = ExampleClass(value=11)
     assert example.value == 11
+
+
+def test_doc() -> None:
+    import setuptools_rust_starter
+
+    assert (
+        setuptools_rust_starter.__doc__
+        == "An example module implemented in Rust using PyO3."
+    )