title: Trigger a Python function exactly on the minute
body: <p>I have a function that I want to trigger at every turn of the minute — at 00 seconds. It fires off a packet over the air to a dumb display that will be mounted on the wall.</p>
  
  <p>I know I can brute force it with a while loop but that seems a bit harsh.</p>
  
  <p>I have tried using sched but that ends up adding a second every minute.</p>
  
  <p>What are my options?</p>