Emulate random.choices for Python < 3.6

config.py.example

@@ -2,10 +2,13 @@ import os
 import random
 import string
 
+def random_choices(population, k):
+    """Emulate random.choices for Python < 3.6"""
+    return [random.choice(population) for _ in range(k)]
 
 class Config:
     SECRET_KEY = os.environ.get('SECRET_KEY') or \
-            ''.join(random.choices(string.ascii_letters, k=20))
+            ''.join(random_choices(string.ascii_letters, k=20))
     DATA_DIR   = os.environ.get('DATA_DIR') or '/var/tmp/prolefeeder-test-data'
     TMP_DIR    = os.environ.get('TMP_DIR') or '/var/tmp'
     MAX_LENGTH = os.environ.get('MAX_LENGTH') or 180