fix: improve error handling

README.md

@@ -18,16 +18,25 @@ Pirkkabot innocently scans K-Ruoka webstore for Pirkka III -beer's price daily.
 - BeautifulSoup :)
 - ScrapeOps
 
-# Run Pirkkabot
+## Run Pirkkabot
 
-To run Pirkkabot, populate secrets, run:
+To run Pirkkabot, populate ScrapeOps API key, run:
 
 ```shell
 pipenv shell
 python3 ./check_price.py
 ```
 
-### PirkkaDB
+## PirkkaDB
 
 As of v1.0.1 Pirkka III-Olut daily price is saved to an SQLite database.
 Database backups are handled at the server backend to the off-site NAS server.
+
+## Contributing
+
+If you wish to contribute to Pirkkabot, please create a pull request with a description of your feature/bug fix.
+
+Some things on the to do list are;
+
+- Vercel hosted API that returns price on /api/price GET
+- Drawing graph on the price data

check_price.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
+# This file is used as a debugging script to test the price scraping function
 
 import requests
 from datetime import date
@@ -19,7 +20,10 @@ def define_price():
         )
     soup = BeautifulSoup(response.content, 'html.parser')
     price = soup.find('span', class_='price')
-    return price
+    if price is None:
+         raise ValueError('Price is None')
+    else:
+      return price
 
 while True:
     try: