Add PyArray0

Author: kngwyu

src/array.rs

@@ -77,6 +77,8 @@ use crate::slice_box::SliceBox;
 /// ```
 pub struct PyArray<T, D>(PyAny, PhantomData<T>, PhantomData<D>);
 
+/// Zero-dimensional array.
+pub type PyArray0<T> = PyArray<T, Ix0>;
 /// One-dimensional array.
 pub type PyArray1<T> = PyArray<T, Ix1>;
 /// Two-dimensional array.
@@ -592,8 +594,6 @@ impl<T: Element, D: Dimension> PyArray<T, D> {
     }
 
     /// Get dynamic dimensioned array from fixed dimension array.
-    ///
-    /// See [get](#method.get) for usage.
     pub fn to_dyn(&self) -> &PyArray<T, IxDyn> {
         let python = self.py();
         unsafe { PyArray::from_borrowed_ptr(python, self.as_ptr()) }
@@ -708,6 +708,13 @@ impl<T: Element, D: Dimension> PyArray<T, D> {
     }
 }
 
+impl<T: Copy + Element> PyArray<T, Ix0> {
+    /// Get the element of zero-dimensional PyArray.
+    pub fn item(&self) -> T {
+        unsafe { *self.data() }
+    }
+}
+
 impl<T: Element> PyArray<T, Ix1> {
     /// Construct one-dimension PyArray from slice.
     ///

src/lib.rs

@@ -46,8 +46,8 @@ mod slice_box;
 mod sum_products;
 
 pub use crate::array::{
-    get_array_module, PyArray, PyArray1, PyArray2, PyArray3, PyArray4, PyArray5, PyArray6,
-    PyArrayDyn,
+    get_array_module, PyArray, PyArray0, PyArray1, PyArray2, PyArray3, PyArray4, PyArray5,
+    PyArray6, PyArrayDyn,
 };
 pub use crate::convert::{IntoPyArray, NpyIndex, ToNpyDims, ToPyArray};
 pub use crate::dtype::{c32, c64, DataType, Element, PyArrayDescr};