pickle does not like defaultdicts

fosdem_video_progress.py

@@ -31,7 +31,7 @@ def get_data() -> tuple[datetime, dict[str, int], dict[str, int]]:
 	for talk in data:
 		states[talk['state']] += 1
 		jobstates[talk['progress']] += 1
-	return time, states, jobstates
+	return time, dict(states), dict(jobstates)
 
 
 def main():
@@ -56,7 +56,6 @@ def main():
 
 		# Show the plot
 		x = sorted(ts.data.keys()) # times
-		# vvv should be a defaultdict anyway, but let's be defensive :-)
 		ys = [tuple(ts.data[time][0].get(state, 0) for state in ts.states) for time in x] # numbers per state
 		# We do not show jobstates atm. Too lazy.
 		# ys are transposed – we need vectors by times, not by states.