如何将键到多个值映射到dataframe列？

Question

我有一个df列,看起来像这样:

col1
Non Profit
Other-501c3
501c3
Sole Proprietor

如何创建字典对象或映射层(对所有建议开放),如果它符合标准并更改键值,我可以传递任何值？

例如,如果值是,Other-501c3则将其更改为non-profit.

示例(等号后的所有内容都需要更改为等号前的值):

1. non-profit = (Non Profit, Other-501c3, 501c3,NON-Profit, Not-for-profit).

2. Sole Proprietor = (Sole Proprietor,Sole Proprietorship)

解决方案应该是可扩展的,我可以添加更多"关键值"对

先感谢您.

Answer 1

从keys 创建字典，将它们合并并map：

L1 = ['Non Profit', 'Other-501c3', '501c3','NON-Profit', 'Not-for-profit']
d1 = dict.fromkeys(L1, 'non-profit')

L2 = ['Sole Proprietor','Sole Proprietorship']
d2 = dict.fromkeys(L2, 'Sole Proprietor')

d = {**d1, **d2}
print (d)
{'Non Profit': 'non-profit', 
 'Other-501c3': 'non-profit', 
 '501c3': 'non-profit',
 'NON-Profit': 'non-profit', 
 'Not-for-profit': 'non-profit', 
 'Sole Proprietor': 'Sole Proprietor',
 'Sole Proprietorship': 'Sole Proprietor'}

df['new'] = df['col1'].map(d)
print (df)
              col1              new
0       Non Profit       non-profit
1      Other-501c3       non-profit
2            501c3       non-profit
3  Sole Proprietor  Sole Proprietor