import pandas as pd
import numpy as np
series1 = pd.Series([2.8, 3.01, 8.99, 8.58, 5.18])
series1
0 2.80
1 3.01
2 8.99
3 8.58
4 5.18
dtype: float64
# 序列结构
type(series1)
pandas.core.series.Series
series2 = pd.Series([2.8, 3.01, 8.99, 8.58, 5.18], index=['a', 'b', 'c', 'd', 'e'],
