From 3257fd9b952359d01e1a30639e01f404f97cb9bf Mon Sep 17 00:00:00 2001
From: Adam Reichold <adam.reichold@t-online.de>
Date: Sat, 18 Sep 2021 22:03:53 +0200
Subject: [PATCH 1/2] Re-export ndarray to avoid having to specify the correct
 version in downstream crates.

---
 src/lib.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 0634495b3..6b01a86aa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -45,6 +45,8 @@ mod readonly;
 mod slice_box;
 mod sum_products;
 
+pub use ndarray;
+
 pub use crate::array::{
     get_array_module, PyArray, PyArray0, PyArray1, PyArray2, PyArray3, PyArray4, PyArray5,
     PyArray6, PyArrayDyn,

From f8ccfe16c4ca6a725a892e06ee2d3d8791c3bbe9 Mon Sep 17 00:00:00 2001
From: Adam Reichold <adam.reichold@t-online.de>
Date: Sat, 18 Sep 2021 22:16:51 +0200
Subject: [PATCH 2/2] Extend README to cover handling non-unified dependencies
 on semver-incompatible ndarray versions.

---
 README.md | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/README.md b/README.md
index 2f26e4c66..533f04a24 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,32 @@ You can also automatically specify python version in `setup.py`,
 using [setuptools-rust](https://github.com/PyO3/setuptools-rust).
 
 
+## Dependency on ndarray
+
+This crate uses types from `ndarray` in its public API. `ndarray` is re-exported
+in the crate root so that you do not need to specify it as a direct dependency.
+
+Furthermore, this crate is compatible multiple versions of `ndarray` and therefore depends
+on a range of semver-incompatible versions, currently `>= 0.13, < 0.16`. Cargo does not
+automatically choose a single version of `ndarray` by itself if you depend directly or indirectly
+on anything but that exact range. It can therefore be necessary to manually unify these dependencies.
+
+For example, if you specify the following dependencies
+
+```toml
+numpy = "0.14"
+ndarray = "0.13"
+```
+
+this will currently depend on both version `0.13.1` and `0.15.3` of `ndarray` by default
+even though `0.13.1` is within the range `>= 0.13, < 0.16`. To fix this, you can run
+
+```sh
+cargo update ---package ndarray:0.15.3 --precise 0.13.1
+```
+
+to achieve a single dependency on version `0.13.1` of `ndarray`.
+
 ## Example