pythonnet · lostmsu · Oct 16, 2021 · Oct 15, 2021
diff --git a/src/runtime/Python.Runtime.csproj b/src/runtime/Python.Runtime.csproj
@@ -14,6 +14,7 @@
    <PackageIcon>python-clear.png</PackageIcon>
    <PackageIconUrl>https://raw.githubusercontent.com/pythonnet/pythonnet/master/src/console/python-clear.ico</PackageIconUrl>
    <PackageProjectUrl>https://pythonnet.github.io/</PackageProjectUrl>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
    <PublishRepositoryUrl>true</PublishRepositoryUrl>
    <Description>Python and CLR (.NET and Mono) cross-platform language interop</Description>

@@ -37,6 +38,7 @@

  <ItemGroup>
    <None Include="..\..\LICENSE" Pack="true" PackagePath="" />
+    <None Include="README.md" Pack="true" PackagePath="" />
    <None Include="..\..\src\console\python-clear.png" Pack="true" PackagePath="" />
  </ItemGroup>


diff --git a/src/runtime/README.md b/src/runtime/README.md
@@ -0,0 +1,75 @@
+`pythonnet` is a package that gives .NET programmers ability to
+integrate Python engine and use Python libraries.
+
+## Embedding Python in .NET
+
+-  You must set `Runtime.PythonDLL` property or `PYTHONNET_PYDLL` environment variable,
+   otherwise you will receive `BadPythonDllException`
+   (internal, derived from `MissingMethodException`) upon calling `Initialize`.
+   Typical values are `python38.dll` (Windows), `libpython3.8.dylib` (Mac),
+   `libpython3.8.so` (most other *nix). Full path may be required.
+-  All calls to Python should be inside a
+   `using (Py.GIL()) {/* Your code here */}` block.
+-  Import python modules using `dynamic mod = Py.Import("mod")`, then
+   you can call functions as normal, eg `mod.func(args)`.
+   You can also access Python objects via `PyObject` and dervied types
+   instead of using `dynamic`.
+-  Use `mod.func(args, Py.kw("keywordargname", keywordargvalue))` or
+   `mod.func(args, keywordargname: keywordargvalue)` to apply keyword
+   arguments.
+-  Mathematical operations involving python and literal/managed types
+   must have the python object first, eg. `np.pi * 2` works,
+   `2 * np.pi` doesn't.
+
+## Example
+
+```csharp
+using var _ = Py.GIL();
+
+dynamic np = Py.Import("numpy");
+Console.WriteLine(np.cos(np.pi * 2));
+
+dynamic sin = np.sin;
+Console.WriteLine(sin(5));
+
+double c = (double)(np.cos(5) + sin(5));
+Console.WriteLine(c);
+
+dynamic a = np.array(new List<float> { 1, 2, 3 });
+Console.WriteLine(a.dtype);
+
+dynamic b = np.array(new List<float> { 6, 5, 4 }, dtype: np.int32);
+Console.WriteLine(b.dtype);
+
+Console.WriteLine(a * b);
+Console.ReadKey();
+```
+
+Output:
+
+```
+1.0
+-0.958924274663
+-0.6752620892
+float64
+int32
+[  6.  10.  12.]
+```
+
+
+
+## Resources
+
+Information on installation, FAQ, troubleshooting, debugging, and
+projects using pythonnet can be found in the Wiki:
+
+https://github.com/pythonnet/pythonnet/wiki
+
+Mailing list
+    https://mail.python.org/mailman/listinfo/pythondotnet
+Chat
+    https://gitter.im/pythonnet/pythonnet
+
+### .NET Foundation
+
+This project is supported by the [.NET Foundation](https://dotnetfoundation.org).