如何在 Pandas 列中查找和提取部分字符串并将其编码到新列中

Answer 1

一个可能的解决方案，基于pandas.crosstab：

df['language'] = df['language'].str.split(' / ')
df = df.explode('language')
pd.crosstab(index=df['Id'], columns=df['language'])

输出：

language  German - C1  German C2  No  Portuguese - C1  Spanish - B2  \
Id                                                                    
1                   0          0   0                0             0   
2                   0          0   1                0             0   
3                   0          0   0                0             1   
4                   1          0   0                1             0   
5                   0          0   1                0             0   
6                   0          1   0                0             0   
7                   0          0   1                0             0   
8                   0          0   0                1             1   

language  Spanish - C1  
Id                      
1                    1  
2                    0  
3                    0  
4                    1  
5                    0  
6                    0  
7                    0  
8                    0