updated readme to include exact python version

README.md

@@ -80,13 +80,13 @@ Otherwise, follow the step-by-step guide below.
 
 ## Preliminaries
 
-This project uses python 3, and the common data science libraries `pandas` and `scikit-learn`. A full list of requirements is included in the `requirements.txt` file. To install all of the requirements at once, run the following code into terminal:
+This project uses python 3.6, and the common data science libraries `pandas` and `scikit-learn`. If you are on python 3.x less than 3.6, you will find some syntax errors wherever f-strings have been used for string formatting. These are fortunately very easy to fix (just rebuild the string using your preferred method), but I do encourage you to upgrade to 3.6 to enjoy the elegance of f-strings. A full list of requirements is included in the `requirements.txt` file. To install all of the requirements at once, run the following code in terminal:
 
 ```bash
 pip install -r requirements.txt
 ```
 
-To get started, clone this project and unzip it. This will become our working directory, so make sure you `cd` your terminal instance into this directory.
+To get started, clone this project and unzip it. This folder will become our working directory, so make sure you `cd` your terminal instance into this directory.
 
 ## Historical data