爲什麼我的數據幀沒有總和？

import pandas as pd 
output=pd.read_csv('output.csv',encoding='big5') 

output['airplane'].sum()

我試圖總結數據框中的數字，但是當調用sum()時，它只是打印出我希望總結的數字。爲什麼不把所有的數字相加？爲什麼我的數據幀沒有總和？

'5,0514,7834,3734,7925,4624,9404,8344,9045,1964,0213,9405,0515,1894,9805,0556,0595,7194,6255,4985,3305,3175,3785,6494,5514,3335,1605,3175,3175,3435,8994,6164,3145,2915,2445,2905,5055,7344,5074,1965,4815,6215,6135,6756,0035,1004,0065,5815,2963,1683,5623,8734,1104,2144,6275,3745,2025,8545,3684,5614,4245,3405,0525,0985,0945,6404,6874,3575,0355,0665,2985,1125,5954,9374,4015,2595,1505,2215,1755,9214,6694,3595,2935,2185,2695,3356,1814,9284,5755,1725,3925,8546,4215,5494,5423,7324,63

來源

2017-03-06 ben

通過str.replace或replace更換,空字符串，然後通過astype轉換爲int，因爲,是千位分隔符：

output = pd.DataFrame({'airplane':['5,051','4,783','4,373']}) 
print (output) 
    airplane 
0 5,051 
1 4,783 
2 4,373 

print (output['airplane'].sum()) 
5,0514,7834,373 

print (output['airplane'].str.replace(',','').astype(int).sum()) 
14207

print (output['airplane'].replace(',','', regex=True).astype(int).sum()) 
14207

但你可以嘗試也添加參數thousands至read_csv：

output=pd.read_csv('output.csv',encoding='big5', thousands=',') 

print (output['airplane'].sum())

來源

2017-03-06 15:10:31 jezrael

Bur我的號碼包含'，'，我無法將其轉換。 – ben

ok，什麼是'print（output ['airplane']。head（））' – jezrael

0 5,051 1 4,783 2 4,373 3 4,792 4 5,462 名稱：airplane，dtype：object – ben

爲什麼我的數據幀沒有總和？

回答

相關問題