basic_test: print python version

examples/basic/BUILD.bazel

diff --git a/examples/basic/BUILD.bazel b/examples/basic/BUILD.bazel
index ba62fd2..797bf56 100644
--- a/examples/basic/BUILD.bazel
+++ b/examples/basic/BUILD.bazel
@@ -1,5 +1,6 @@
 load("@pybind11_bazel//:build_defs.bzl", "pybind_extension")
-load("@rules_python//python:defs.bzl", "py_library", "py_test")
+load("@rules_python//python:py_library.bzl", "py_library")
+load("@rules_python//python:py_test.bzl", "py_test")
 
 pybind_extension(
     name = "basic",

examples/basic/basic_test.py

diff --git a/examples/basic/basic_test.py b/examples/basic/basic_test.py
index 0a1f15a..ec66521 100644
--- a/examples/basic/basic_test.py
+++ b/examples/basic/basic_test.py
@@ -1,4 +1,5 @@
 import unittest
+import sys
 
 import basic
 
@@ -11,4 +12,5 @@
 
 
 if __name__ == "__main__":
+  print(sys.version)
   unittest.main()