remove syntax warning (#3505)

max-sixty · dcherian · commit 897b5d153a9f · 2019-11-09T14:30:32.000-07:00
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

Original file line number	Diff line number	Diff line change
`@@ -288,7 +288,7 @@ def line(`
`288`	`288`	`)`
`289`	`289`
`290`	`290`	`# The allargs dict passed to _easy_facetgrid above contains args`
`291`		`- if args is ():`
	`291`	`+ if args == ():`
`292`	`292`	`args = kwargs.pop("args", ())`
`293`	`293`	`else:`
`294`	`294`	`assert "args" not in kwargs`