Pandas之Series

import pandas as pd
# Series数据结构
# 传入一个列表
S1 =pd.Series(['a','b','c','d'])
print(S1)
# 指定索引
print('................')
S2 =pd.Series([1,2,3,4],index=['a','s','f','d'])
print(S2)
# 传入一个字典
print('................')
S3 =pd.Series({'a':1,'b':2,'c':3})
print(S3)
# 利用index方法获取Series的索引
print('................')
print(S1.index)
print(S2.index)
print(S3.index)
# 利用values方法获取Series的值
print('................')
print(S1.values)
print(S2.values)
print(S3.values)

0    a
1    b
2    c
3    d
dtype: object
................
a    1
s    2
f    3
d    4
dtype: int64
................
a    1
b    2
c    3
dtype: int64
................
RangeIndex(start=0, stop=4, step=1)
Index(['a', 's', 'f', 'd'], dtype='object')
Index(['a', 'b', 'c'], dtype='object')
................
['a' 'b' 'c' 'd']
[1 2 3 4]
[1 2 3]