Further readme

README.md

@@ -20,3 +20,18 @@ This file is based on an example from [the postgresSQL website](http://www.postg
 
 I've included a bunch of annotated SQL queries in `sql/queries.pgsql` and `sql/weather.pgsql`. The latter file is specifically about the weather dataset; the former is more general. Some of the queries are copied into the `py/util.py` file, but changing these two files will do nothing on their own.
 
+## Python
+
+`requirements.txt` contains the python packages required to set up a virtual environment with `virtualenv -p /usr/bin/python3 venv` and `pip install -r requirements.txt`. Notably these are:
+
+
+* numpy
+* pandas
+* pkg-resources
+* psycopg2-binary
+* pyparsing
+* python-dateutil
+* pytz
+* scipy
+* seaborn
+* statsmodels