Add default param to secax constructor

ZachDaChampion · ZachDaChampion · commit b2d2bc75dc03 · 2023-04-20T16:54:50.000-04:00
diff --git a/lib/matplotlib/axes/_secondary_axes.py b/lib/matplotlib/axes/_secondary_axes.py
@@ -14,7 +14,8 @@ class SecondaryAxis(_AxesBase):
     General class to hold a Secondary_X/Yaxis.
     """
 
-    def __init__(self, parent, orientation, location, functions, transform, **kwargs):
+    def __init__(self, parent, orientation, location, functions, transform=None,
+                 **kwargs):
         """
         See `.secondary_xaxis` and `.secondary_yaxis` for the doc string.
         While there is no need for this to be private, it should really be
