remove syntax warning (#3505)

pydata · Nov 9, 2019 · 897b5d1 · 897b5d1
1 parent db0f13d
commit 897b5d1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/xarray/plot/plot.py b/xarray/plot/plot.py
@@ -288,7 +288,7 @@ def line(
         )
 
     # The allargs dict passed to _easy_facetgrid above contains args
-    if args is ():
+    if args == ():
         args = kwargs.pop("args", ())
     else:
         assert "args" not in kwargs