Switch to using dotenv module to retrieve environment variables

.gitignore

@@ -0,0 +1 @@
+.env

download_spx_quotes.py

@@ -5,7 +5,12 @@ import schedule
 import time
 import zipfile
 
-quotes_directory = os.environ['DOWNLOAD_DIRECTORY']
+from dotenv import load_dotenv
+from os import getenv
+
+load_dotenv()
+
+quotes_directory = getenv('DOWNLOAD_DIRECTORY')
 download_directory = quotes_directory + 'Zip Archive/'
 
 def process_file(file: str):
@@ -20,11 +25,11 @@ def download_quotes():
     client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
     client.connect(
         hostname='sftp.datashop.livevol.com', 
-        username=os.environ['USER'], 
+        username=getenv('USER'), 
-        password=os.environ['PASSWORD']
+        password=getenv('PASSWORD')
     )
     sftp = client.open_sftp()
-    sftp.chdir('./subscriptions/' + os.environ['ORDER'] + '/' + os.environ['ITEM'])
+    sftp.chdir('./subscriptions/' + getenv('ORDER') + '/' + getenv('ITEM'))
     files = sftp.listdir()
     for file in files:
         local_file = download_directory + file

requirements.txt

@@ -1,4 +1,5 @@
 pandas
 paramiko
+python-dotenv
 pytz
 schedule