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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
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