如何在python中对列范围求和

如何在python中对列范围求和,python,pandas,dataframe,Python,Pandas,Dataframe,这是我的数据 df No Name Address English History Math Physics Chemistry Biology 1 Arthur New York 80 65 100 89 92 94 2 Barthur New Mexico 70 60 94 83 82 95 我所做的是 df[

这是我的数据

df 

No Name     Address    English  History  Math   Physics  Chemistry  Biology
1  Arthur   New York        80       65   100        89         92       94
2  Barthur  New Mexico      70       60    94        83         82       95
我所做的是

df['Science']=df['Math']+df['Physics']+df['Chemistry']+df['Biology']

我的问题是,实际数据超过900列,如何替换
df['Math']+df['Physics']+df['Chemistry']+df['Biology']
df['Math']
df['Biology']
(按范围计算)

我希望这个问题足够清楚

我认为您需要按职位选择:

df['sum'] = df.iloc[:, 3:].sum(axis=1)
或删除不需要的数字列:

df['sum'] = df.drop('No', axis=1).sum(axis=1)

编辑:

如果只需要从
5
到结尾的所有列:

print (df.iloc[:, 5:])
   Math  Physics  Chemistry  Biology
0   100       89         92       94
1    94       83         82       95

print (df.iloc[:, 3:5])
   English  History
0       80       65
1       70       60

df['A'] = df.iloc[:, 3:5].sum(axis=1)
df['Science'] = df.iloc[:, 5:].sum(axis=1)
print (df)
   No     Name     Address  English  History  Math  Physics  Chemistry  \
0   1   Arthur    New York       80       65   100       89         92   
1   2  Barthur  New Mexico       70       60    94       83         82   

   Biology    A  Science  
0       94  145      520  
1       95  130      484  

我也不需要英语和历史,我需要的是
df['Science']=df['Math']+df['Physics']+df['Chemistry']+df['Biology']
。请编辑你的答案。是否可以按组定义所有主题?您应该
df['Science']=df.iloc[:,5:9].sum(axis=1)
,但您可以回答这个问题completely@NabihBawazir-是的,你是对的。感谢您的接受,祝您愉快!
print (df.iloc[:, 5:])
   Math  Physics  Chemistry  Biology
0   100       89         92       94
1    94       83         82       95

print (df.iloc[:, 3:5])
   English  History
0       80       65
1       70       60

df['A'] = df.iloc[:, 3:5].sum(axis=1)
df['Science'] = df.iloc[:, 5:].sum(axis=1)
print (df)
   No     Name     Address  English  History  Math  Physics  Chemistry  \
0   1   Arthur    New York       80       65   100       89         92   
1   2  Barthur  New Mexico       70       60    94       83         82   

   Biology    A  Science  
0       94  145      520  
1       95  130      484