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