is_singular function was missing self argument adding self argument (kennknowles#52)

nick9999 · kennknowles · commit f615451d7b40 · 2019-04-02T20:00:25.000-07:00
diff --git a/jsonpath_rw/jsonpath.py b/jsonpath_rw/jsonpath.py
@@ -340,7 +340,7 @@ def match_recursively(datum):
                 for left_match in left_matches
                 for submatch in match_recursively(left_match)]
             
-    def is_singular():
+    def is_singular(self):
         return False
 
     def update(self, data, val):
