Added basic example of using pybind11 (#86)

* added basic example of using pybind11

Signed-off-by: Ross <rocebxyz@gmail.com>

* cleaned up module.bazel and removed Workspace

Signed-off-by: Ross <rocebxyz@gmail.com>

* cleaned up module.bazel and lock file

Signed-off-by: Ross <rocebxyz@gmail.com>

* renamed cpp and py files, and simplifed the example

Signed-off-by: Ross <rocebxyz@gmail.com>

* updated build.bazel to be easier to understand and simplier

Signed-off-by: Ross <rocebxyz@gmail.com>

* removed python toolchain

Signed-off-by: Ross <rocebxyz@gmail.com>

---------

Signed-off-by: Ross <rocebxyz@gmail.com>
Co-authored-by: Ross <rocebxyz@gmail.com>

Author: roceb

examples/basic/BUILD.bazel

@@ -0,0 +1,17 @@
+load("@pybind11_bazel//:build_defs.bzl", "pybind_extension")
+load("@rules_python//python:defs.bzl", "py_library", "py_test")
+
+pybind_extension(
+    name = "basic",
+    srcs = ["basic.cpp"],
+)
+py_library(
+    name = "basic_lib",
+    data = [":basic"],
+    imports = ["."],
+)
+py_test(
+    name = "basic_test",
+    srcs = ["basic_test.py"],
+    deps = [":basic_lib"],
+)

examples/basic/MODULE.bazel

@@ -0,0 +1,3 @@
+bazel_dep(name = "pybind11_bazel", version = "2.12.0")
+bazel_dep(name = "rules_python", version = "0.33.1")
+

examples/basic/basic.cpp

@@ -0,0 +1,10 @@
+#include <pybind11/pybind11.h>
+
+int add(int i, int j) {
+    return i + j;
+}
+
+PYBIND11_MODULE(basic, module) {
+    module.doc() = "A basic pybind11 extension";
+    module.def("add", &add, "A function that adds two numbers");
+}

examples/basic/basic_test.py

@@ -0,0 +1,13 @@
+import unittest
+
+import basic
+
+
+class TestBasic(unittest.TestCase):
+    def test_add(self):
+        self.assertEqual(basic.add(1, 2), 3)
+        self.assertEqual(basic.add(2, 2), 4)
+
+
+if __name__ == "__main__":
+    unittest.main()