Python 正则表达式数据帧
我有一个数据框,看起来像:Python 正则表达式数据帧,python,pandas,Python,Pandas,我有一个数据框,看起来像: import pandas as pd df= pd.DataFrame({'type':['-','L1iability','-','Liability1','-'],'Amount':[10,-10,20,-20,5]}) df 我想用“第三个”替换类型列中除“-”以外的所有内容。如何使用replace命令和regex执行此操作?IIUCmask df['3rdcol']=df.type.mask(~(df.type=='-'),'Liability1') d
import pandas as pd
df= pd.DataFrame({'type':['-','L1iability','-','Liability1','-'],'Amount':[10,-10,20,-20,5]})
df
我想用“第三个”替换类型列中除“-”以外的所有内容。如何使用replace命令和regex执行此操作?IIUCmask
df['3rdcol']=df.type.mask(~(df.type=='-'),'Liability1')
df
Out[303]:
Amount type 3rdcol
0 10 - -
1 -10 L1iability Liability1
2 20 - -
3 -20 Liability1 Liability1
4 5 - -
替换为什么?将“l1ability”和“Liability1”替换为“3rd”数据帧对象没有属性type@NumberLogicdf['3rdcol']=df['type'].mask(~(df.type='-'),'Liability1'))