Merge pull request #12028 from meeseeksmachine/auto-backport-of-pr-12023-on-v3.0.x

timhoffm · web-flow · commit af1bce3fc4d9 · 2018-09-05T23:40:22.000+02:00
Backport PR #12023 on branch v3.0.x (Fix deprecation check in wx Timer.)
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -121,7 +121,7 @@ class TimerWx(TimerBase):
     '''
 
     def __init__(self, *args, **kwargs):
-        if isinstance(args[0], wx.EvtHandler):
+        if args and isinstance(args[0], wx.EvtHandler):
             cbook.warn_deprecated(
                 "3.0", "Passing a wx.EvtHandler as first argument to the "
                 "TimerWx constructor is deprecated since %(version)s.")
