Merge branch 'master' into pyclass-new-layout

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## Unreleased
 
+### Changed
+
+* The blanket implementations for `FromPyObject` for `&T` and `&mut T` are no longer specializable. Implement `PyTryFrom` for your type to control the behavior of `FromPyObject::extract()` for your types.
+* The implementation for `IntoPy<U> for T` where `U: FromPy<T>` is no longer specializable. Control the behavior of this via the implementation of `FromPy`.
+
+## [0.8.5]
+
 * Support for `#[name = "foo"]` attribute for `#[pyfunction]` and in `#[pymethods]`. [#692](https://github.com/PyO3/pyo3/pull/692)
 * Implemented `FromPyObject` for `HashMap` and `BTreeMap`
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pyo3"
-version = "0.8.4"
+version = "0.8.5"
 description = "Bindings to Python interpreter"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 readme = "README.md"
@@ -22,7 +22,7 @@ appveyor = { repository = "fafhrd91/pyo3" }
 libc = "0.2.62"
 spin = "0.5.1"
 num-traits = "0.2.8"
-pyo3cls = { path = "pyo3cls", version = "=0.8.4" }
+pyo3cls = { path = "pyo3cls", version = "=0.8.5" }
 num-complex = { version = ">= 0.2", optional = true }
 num-bigint = { version = ">= 0.2", optional = true }
 inventory = "0.1.4"

README.md

@@ -50,7 +50,7 @@ name = "string_sum"
 crate-type = ["cdylib"]
 
 [dependencies.pyo3]
-version = "0.8.4"
+version = "0.8.5"
 features = ["extension-module"]
 ```
 
@@ -95,7 +95,7 @@ Add `pyo3` to your `Cargo.toml` like this:
 
 ```toml
 [dependencies]
-pyo3 = "0.8.4"
+pyo3 = "0.8.5"
 ```
 
 Example program displaying the value of `sys.version` and the current user name:

guide/src/class.md

@@ -86,6 +86,23 @@ pyo3::inventory::collect!(MyClassGeneratedPyo3Inventory);
 # pyo3::py_run!(py, cls, "assert cls.__name__ == 'MyClass'")
 ```
 
+## Add class to module
+
+Custom Python classes can then be added to a module using `add_class`.
+
+```rust
+# use pyo3::prelude::*;
+# #[pyclass]
+# struct MyClass {
+#    num: i32,
+#    debug: bool,
+# }
+#[pymodule]
+fn mymodule(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_class::<MyClass>()?;
+    Ok(())
+}
+```
 
 ## Get Python objects from `pyclass`
 You sometimes need to convert your `pyclass` into a Python object in Rust code (e.g., for testing it).
@@ -568,13 +585,59 @@ use pyo3::types::{PyDict, PyTuple};
 #
 #[pymethods]
 impl MyClass {
-    #[args(arg1=true, args="*", arg2=10, args3="\"Hello\"", kwargs="**")]
+    #[new]
-    fn method(&self, arg1: bool, args: &PyTuple, arg2: i32, arg3: &str, kwargs: Option<&PyDict>) -> PyResult<i32> {
+    #[args(num = "-1", debug = "true")]
-        Ok(1)
+    fn new(num: i32, debug: bool) -> Self {
+        MyClass { num, debug }
+    }
+
+    #[args(
+        num = "10",
+        debug = "true",
+        py_args = "*",
+        name = "\"Hello\"",
+        py_kwargs = "**"
+    )]
+    fn method(
+        &mut self,
+        num: i32,
+        debug: bool,
+        name: &str,
+        py_args: &PyTuple,
+        py_kwargs: Option<&PyDict>,
+    ) -> PyResult<String> {
+        self.debug = debug;
+        self.num = num;
+        Ok(format!(
+            "py_args={:?}, py_kwargs={:?}, name={}, num={}, debug={}",
+            py_args, py_kwargs, name, self.num, self.debug
+        ))
+    }
+
+    fn make_change(&mut self, num: i32, debug: bool) -> PyResult<String> {
+        self.num = num;
+        self.debug = debug;
+        Ok(format!("num={}, debug={}", self.num, self.debug))
     }
 }
 ```
+N.B. the position of the `"*"` argument (if included) controls the system of handling positional and keyword arguments. In Python:
+```python
+import mymodule
 
+mc = mymodule.MyClass()
+print(mc.method(44, False, "World", 666, x=44, y=55))
+print(mc.method(num=-1, name="World"))
+print(mc.make_change(44, False))
+print(mc.make_change(debug=False, num=-1))
+```
+Produces output:
+```text
+py_args=('World', 666), py_kwargs=Some({'x': 44, 'y': 55}), name=Hello, num=44, debug=false
+py_args=(), py_kwargs=None, name=World, num=-1, debug=true
+num=44, debug=false
+num=-1, debug=false
+```
 
 ## Class customizations
 

guide/src/get_started.md

@@ -44,7 +44,7 @@ name = "string_sum"
 crate-type = ["cdylib"]
 
 [dependencies.pyo3]
-version = "0.8.4"
+version = "0.8.5"
 features = ["extension-module"]
 ```
 
@@ -89,7 +89,7 @@ Add `pyo3` to your `Cargo.toml` like this:
 
 ```toml
 [dependencies]
-pyo3 = "0.8.4"
+pyo3 = "0.8.5"
 ```
 
 Example program displaying the value of `sys.version` and the current user name:

pyo3-derive-backend/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pyo3-derive-backend"
-version = "0.8.4"
+version = "0.8.5"
 description = "Code generation for PyO3 package"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 keywords = ["pyo3", "python", "cpython", "ffi"]

pyo3-derive-backend/src/defs.rs

@@ -31,7 +31,7 @@ pub const OBJECT: Proto = Proto {
         MethodProto::Binary {
             name: "__delattr__",
             arg: "Name",
-            pyres: true,
+            pyres: false,
             proto: "pyo3::class::basic::PyObjectDelAttrProtocol",
         },
         MethodProto::Unary {

pyo3cls/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pyo3cls"
-version = "0.8.4"
+version = "0.8.5"
 description = "Proc macros for PyO3 package"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 keywords = ["pyo3", "python", "cpython", "ffi"]
@@ -17,7 +17,7 @@ proc-macro = true
 quote = "1"
 proc-macro2 = "1"
 syn = { version = "1", features = ["full", "extra-traits"] }
-pyo3-derive-backend = { path = "../pyo3-derive-backend", version = "=0.8.4" }
+pyo3-derive-backend = { path = "../pyo3-derive-backend", version = "=0.8.5" }
 
 [features]
 unsound-subclass = ["pyo3-derive-backend/unsound-subclass"]

src/conversion.rs

@@ -146,7 +146,7 @@ impl<T, U> IntoPy<U> for T
 where
     U: FromPy<T>,
 {
-    default fn into_py(self, py: Python) -> U {
+    fn into_py(self, py: Python) -> U {
         U::from_py(self, py)
     }
 }
@@ -250,7 +250,7 @@ where
     T: PyTryFrom<'a>,
 {
     #[inline]
-    default fn extract(ob: &'a PyAny) -> PyResult<&'a T> {
+    fn extract(ob: &'a PyAny) -> PyResult<&'a T> {
         Ok(T::try_from(ob)?)
     }
 }
@@ -261,7 +261,7 @@ where
     T: PyTryFrom<'a>,
 {
     #[inline]
-    default fn extract(ob: &'a PyAny) -> PyResult<&'a mut T> {
+    fn extract(ob: &'a PyAny) -> PyResult<&'a mut T> {
         Ok(T::try_from_mut(ob)?)
     }
 }

src/lib.rs

@@ -48,7 +48,7 @@
 //! crate-type = ["cdylib"]
 //!
 //! [dependencies.pyo3]
-//! version = "0.8.4"
+//! version = "0.8.5"
 //! features = ["extension-module"]
 //! ```
 //!
@@ -93,7 +93,7 @@
 //!
 //! ```toml
 //! [dependencies]
-//! pyo3 = "0.8.4"
+//! pyo3 = "0.8.5"
 //! ```
 //!
 //! Example program displaying the value of `sys.version`: