atomic writes

main.py

@@ -2,6 +2,7 @@ import requests
 import time
 import tomllib
 from os import path
+import os
 import json
 from icalendar import Calendar, Event
 from datetime import datetime, timezone
@@ -381,5 +382,7 @@ if __name__ == "__main__":
     schedules = airing["response"]
     print(f"\nGot upcoming episodes for {len(schedules)} anime")
 
-    with open("anime.ics", "wb") as f:
-        f.write(createIcal(schedules))
+    ics = createIcal(schedules)
+    with open("anime.ics.tmp", "wb") as f:
+        f.write(ics)
+    os.replace("anime.ics.tmp", "anime.ics")