Detect empty config file

Author: nichtich

lib/config.py

@@ -1,10 +1,8 @@
 from collections import UserDict
 import yaml
 from pathlib import Path
-import glob
 import re
 import os
-import subprocess
 
 
 def get_queries(path):
@@ -20,19 +18,20 @@ def get_queries(path):
 
 class Config(UserDict):
     def __init__(self, file=None, debug=False):
+        self.data = {}
         if file:
             try:
                 with open(file) as stream:
                     self.data = yaml.safe_load(stream)
+                if not self.data:
+                    self.data = {}
             except yaml.YAMLError as err:
                 msg = "Error in %s" % (file)
                 if hasattr(err, 'problem_mark'):
                     mark = err.problem_mark
                     msg += " at line %s char %s" % (mark.line + 1,
                                                     mark.column + 1)
                 raise Exception(msg)
-        else:
-            self.data = {}
 
         self.data["stage"] = os.getenv('STAGE', 'stage')
         self.data["sparql"] = os.getenv('SPARQL', "http://localhost:3030/n4o")