Update README

README.md

@@ -1,19 +1,26 @@
 # eid-image-extractor
+
 ## Introduction
-This is a small python script to extract the image from a Belgian electronic identity card.
+
+This is a small python script to extract the image from a Belgian electronic
+identity card.
 
 ## How to install
-Before running this script you will need a few dependencies, notably, python 3, pip3 and the python module [eidreader](https://github.com/lino-framework/eidreader).
 
-To install eidreader you will also need to have ```swig``` installed. On an Arch system, the installation looks like this:
+All the Python dependencies this script has are declared in the
+`requirements.txt`-file. The script can be ran in a `venv`:
 ```
-sudo pacman -S python3 swig
-sudo pip install eidreader
+python3 -m venv .
+source ./bin/activate
+pip install -r requirements.txt
 ```
 
 ## How to use
-After you installed the dependencies, you can just run the script:
+
+After you installed the dependencies, you can just run the script inside the
+`venv`:
 ```
 python3 eid-image-extractor.py
 ```
-After this, if everything went well, you will see a file with the name ```{NATIONAL_NUMBER}.jpeg``` next to the script.
+After this, if everything went well, you will see a file with the name
+```{NATIONAL_NUMBER}.jpeg``` next to the script.