fixed bug that was making parser pick up unkown args from the environment making it crash. Eg in colab it was picking up jupyter runtime dir in root location. Now we don't need the dummy variable -f in colab

options/base_options.py

@@ -69,7 +69,7 @@ class BaseOptions():
     def parse(self, save=True):
         if not self.initialized:
             self.initialize()
-        self.opt = self.parser.parse_args()
+        self.opt, unknown_arg = self.parser.parse_known_args()
         self.opt.isTrain = self.isTrain   # train or test
 
         str_ids = self.opt.gpu_ids.split(',')