Improve docs for python version

python/README.md

@@ -1,5 +1,9 @@
 # Gilded Rose starting position in Python
 
+For exercise instructions see [top level README](../README.md)
+
+Suggestion: create a python virtual environment for this project. See the [documentation](https://docs.python.org/3/library/venv.html)
+
 ## Run the unit tests from the Command-Line
 
 ```

python/requirements.txt

@@ -0,0 +1,4 @@
+pytest
+approvaltests
+pytest-approvaltests
+coverage