replace Pandas item() implementation with numpy's using .values (#797)

* replace Pandas item() implementation with numpy's using .values

* force value to np.ndarray to enable universal use of .item()

Author: CameronTStark

pvlib/tools.py

@@ -212,7 +212,7 @@ def _scalar_out(input):
     else:  #
         # works if it's a 1 length array and
         # will throw a ValueError otherwise
-        output = input.item()
+        output = np.asarray(input).item()
 
     return output