bug fix: create directory if doesn't exist

ippisite/ippidb/management/commands/update_mrc_files.py

 from django.core.management.base import AppCommand, CommandError
 from ippidb.management.commands import TaskOutWrapper
 from ippidb.models import Chain, InteractFile
+from django import settings
 from django.core.files import File
 from celery import states
 import os
@@ -72,6 +73,12 @@ class Command(AppCommand):
         label = options.get("label")
         if typefile == "interactibility" and not label:
             raise CommandError("Error: Interactibility need a label")
+        if typefile == "druggability":
+            storage_path = Chain.mrc_file.field.storage.path("content/mrc_files")
+        else:
+            storage_path = InteractFile.interact_file.field.storage.path("content/interact_files")
+        if not os.path.exists(storage_path)
+            os.makedirs(storage_path)
         list_files = glob.glob(os.path.join(mrcpath, pattern))
         for data in list_files:
             self.stdout.write(