ignore_cache_false_improved.py

from datetime import datetime

def calculate_users_favorite_color(user, ignore_cache=False):
  now = datetime.now()
  use_cache = not ignore_cache
  
  color, valid_until = None, None
  if use_cache:
    color, valid_until = cache.get(f"user_color_{user.id}")
    # handle the `valid_until` immediatelly
    if valid_until < now:
      return color
    
  # this if was skipped, because the valid cache value was already returned
  
  ...logic...logic...
  color=....
  ...logic...logic...

  if use_cache:
    valid_until = now + datetime.timedelta(days=3, hours=12)
    cache.set(f"user_color_{user.id}", (color, valid_until))

  return color