If using all scalar values, you must pass an index df to excel code example

Example 1: ValueError: If using all scalar values, you must pass an index

>>> df = pd.DataFrame({'A': a, 'B': b}, index=[0])
>>> df
   A  B
0  2  3

Example 2: ValueError: If using all scalar values, you must pass an index

>>> df = pd.DataFrame({'A': [a], 'B': [b]})
>>> df
   A  B
0  2  3