Update app.py

app.py

@@ -7,6 +7,7 @@ import matplotlib.pyplot as plt
 import seaborn as sns
 from matplotlib.backends.backend_agg import FigureCanvasAgg
 from io import BytesIO
+import os
 
 import configparser
 import tweepy
@@ -14,10 +15,10 @@ import tweepy
 config = configparser.ConfigParser()
 config.read('./config.ini')
 
-api_key = config['twitter']['api_key']
-api_key_secret = config['twitter']['api_key_secret']
-access_token = config['twitter']['access_token']
-access_token_secret = config['twitter']['access_token_secret']
+api_key = os.environ.get('api_key')
+api_key_secret = os.environ.get('api_key_secret')
+access_token = os.environ.get('access_token')
+access_token_secret = os.environ.get('access_token_secret')
 
 # Authenticate with Twitter
 auth = tweepy.OAuthHandler(api_key, api_key_secret)