added demo notebook

examples/python/README.md

@@ -0,0 +1,27 @@
+To use this example notebook, create a spack environment and
+install Bedrock with Python support as follows.
+
+```
+spack env create my-bedrock-env
+spack env activate my-bedrock-env
+spack add mochi-bedrock+python
+spack install
+```
+
+Then, with the `my-bedrock-env` spack environment activated,
+create a Python virtual environment as follows.
+
+```
+python -m venv my-bedrock-env
+source my-bedrock-env/bin/activate
+python -m pip install -r requirements.txt
+```
+
+Finally, start Jupyterlab as follows.
+
+```
+jupyter notebook --ip 0.0.0.0 --port 8888 --no-browser
+```
+
+You will be able to connect to the notebook at the URL
+displayed by jupyter on your terminal.