added import safeguard to refresh_events; heeded a deprecation warning

publishconf.py

@@ -27,4 +27,5 @@ DELETE_OUTPUT_DIRECTORY = True
 
 # get event list from calendar(s)
 sys.path.append(os.curdir + "/utils")
-import refresh_events
+from refresh_events import refresh_events as r_events
+r_events()

utils/refresh_events.py

@@ -153,6 +153,8 @@ def handleAttachments(events: list) -> list:
 #    print(event) #DEBUG
   return events
 
+
+def refresh_events():
   # create vobject calendar
   vcal = vobject.newFromBehavior("vcalendar")
 
@@ -163,7 +165,7 @@ with caldav.DAVClient(url=server_url, username=cal_user, password=cal_pass) as d
 
     # put all events from caldav calendar into vobject calendar
     for e in dav_cal.events():
-    for ev in e.instance.contents["vevent"]:
+      for ev in e.vobject_instance.contents["vevent"]:
         vcal.add(ev)
     
   # we only want events belonging to a specific category 
@@ -217,3 +219,6 @@ with open(result_file, 'w') as f:
     # write current datetime to file
     yaml.dump({"written_at": now}, f)
     f.write("---\n")
+
+if __name__ == "__main__":
+  refresh_events()