In [2]:

    

import numpy as np


    

In [4]:

    

a = np.array([1,2,3,4,5], float)


    

In [6]:

    

a.mean()


    

    
Out[6]:





3.0

In [8]:

    

a.sum()


    

    
Out[8]:





15.0

In [11]:

    

b = np.array([1,2,3,4,5,6])


    

In [12]:

    

b.mean()


    

    
Out[12]:





3.5

In [13]:

    

b.sum()


    

    
Out[13]:





21

In [18]:

    

import pandas as pd


    

In [19]:

    

series = pd.Series(['David', 'Cheng-Han', 'test', 42, -14324])


    

In [22]:

    

series


    

    
Out[22]:





0        David
1    Cheng-Han
2         test
3           42
4       -14324
dtype: object

In [23]:

    

type(series)


    

    
Out[23]:





pandas.core.series.Series

In [ ]: