how to start index from 1 in pandas code example

Example 1: df index start from 1

>>> result.index += 1 
>>> result.index
Int64Index([1, 2, 3], dtype=int64)

Example 2: index start from 1 pandas

>>> result.index += 1 
>>> result.index
Int64Index([1, 2, 3], dtype=int64)