Merge pull request #18584 from QuLogic/fix-tornado-timer

jklymak · web-flow · commit 70c5f2bcace6 · 2020-09-26T17:22:24.000-07:00
Fix setting 0-timeout timer with Tornado.
diff --git a/lib/matplotlib/backends/backend_webagg_core.py b/lib/matplotlib/backends/backend_webagg_core.py
@@ -512,7 +512,7 @@ def _timer_start(self):
         else:
             self._timer = tornado.ioloop.PeriodicCallback(
                 self._on_timer,
-                self.interval)
+                max(self.interval, 1e-6))
             self._timer.start()
 
     def _timer_stop(self):
