Use IntoPy<PyObject> for PyModule::add

CHANGELOG.md

@@ -27,7 +27,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - `IntoPy` is no longer implied by `FromPy`. [#1063](https://github.com/PyO3/pyo3/pull/1063)
 - `PyObject` is now just a type alias for `Py<PyAny>`. [#1063](https://github.com/PyO3/pyo3/pull/1063)
 - Implement `Send + Sync` for `PyErr`. `PyErr::new`, `PyErr::from_type`, `PyException::py_err` and `PyException::into` have had these bounds added to their arguments. [#1067](https://github.com/PyO3/pyo3/pull/1067)
-- Change `#[pyproto]` to return NotImplemented for operators for which Python can try a reversed operation. [1072](https://github.com/PyO3/pyo3/pull/1072)
+- Change `#[pyproto]` to return NotImplemented for operators for which Python can try a reversed operation. #[1072](https://github.com/PyO3/pyo3/pull/1072)
+- `PyModule::add` now uses `IntoPy<PyObject>` instead of `ToPyObject`. #[1124](https://github.com/PyO3/pyo3/pull/1124)
 
 ### Removed
 - Remove `PyString::as_bytes`. [#1023](https://github.com/PyO3/pyo3/pull/1023)

src/types/module.rs

@@ -10,7 +10,7 @@ use crate::pyclass::PyClass;
 use crate::type_object::PyTypeObject;
 use crate::types::PyTuple;
 use crate::types::{PyAny, PyDict, PyList};
-use crate::{AsPyPointer, IntoPy, Py, PyObject, Python, ToPyObject};
+use crate::{AsPyPointer, IntoPy, Py, PyObject, Python};
 use std::ffi::{CStr, CString};
 use std::os::raw::c_char;
 use std::str;
@@ -159,12 +159,12 @@ impl PyModule {
     /// This is a convenience function which can be used from the module's initialization function.
     pub fn add<V>(&self, name: &str, value: V) -> PyResult<()>
     where
-        V: ToPyObject,
+        V: IntoPy<PyObject>,
     {
         self.index()?
             .append(name)
             .expect("could not append __name__ to __all__");
-        self.setattr(name, value)
+        self.setattr(name, value.into_py(self.py()))
     }
 
     /// Adds a new extension type to the module.

tests/test_module.rs

@@ -285,3 +285,23 @@ fn test_vararg_module() {
     py_assert!(py, m, "m.int_vararg_fn() == [5, ()]");
     py_assert!(py, m, "m.int_vararg_fn(1, 2) == [1, (2,)]");
 }
+
+#[test]
+fn test_module_with_constant() {
+    // Regression test for #1102
+
+    #[pymodule]
+    fn module_with_constant(_py: Python, m: &PyModule) -> PyResult<()> {
+        const ANON: AnonClass = AnonClass {};
+
+        m.add("ANON", ANON)?;
+        m.add_class::<AnonClass>()?;
+
+        Ok(())
+    }
+
+    Python::with_gil(|py| {
+        let m = pyo3::wrap_pymodule!(module_with_constant)(py);
+        py_assert!(py, m, "isinstance(m.ANON, m.AnonClass)");
+    });
+}