pandas库Series类型与基本操作

a = pd.Series({'a':1,'b':5})
a.index
a.values

Index(['a', 'b'], dtype='object')
array([1, 5], dtype=int64)

a[0]  #自动索引
a['a']#自定义索引

'a' in a
True
1 in a
False

a = pd.Series([1,3,5],index = ['a','b','c'])
b = pd.Series([2,4,5,6],index = ['c,','d','e','b'])
a+b

a     NaN
b     9.0
c     NaN
c,    NaN
d     NaN
e     NaN
dtype: float64

a.index = ['c','d','e']
a

c    1
d    3
e    5