Consider ourselves interactive if sys.flags.interactive is set.

mdboom · mdboom · commit d770eb952c8e · 2013-10-07T14:16:31.000-04:00
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -1191,7 +1191,8 @@ def interactive(b):
 
 def is_interactive():
     'Return true if plot mode is interactive'
-    b = rcParams['interactive'] and hasattr(sys, 'ps1')
+    b = rcParams['interactive'] and (
+        hasattr(sys, 'ps1') or sys.flags.interactive)
     return b
 
 def tk_window_focus():
