python pandas按子串融化列

Question

I have dataframe:

         subject           A_target_word_gd  A_target_word_fd B_target_word_gd  B_target_word_fd  subject_type 
           1                      1             2                3                    4             mild 
           2                      11            12               13                   14             moderate

And I want to melt it to a dataframe that will look:

     cond    subject    subject_type     value_type   value
      A         1        mild             gd           1           
      A         1        mild             fg           2           
      B         1        mild             gd           3            
      B         1        mild             fg           4  
      A         2        moderate         gd           11           
      A         2        moderate         fg           12           
      B         2        moderate         gd           13            
      B         2        moderate         fg           14          
...

...

Meaning, to melt based on the delimiter.

What is the best way to do that?

Answer 1

您可以使用str.split()在分隔符上融合，这在融合数据框和R 分割值以及基于逗号分隔字符向量列的值的 Python 融合数据框和基于逗号值的Python 融合数据框中进行了解释-python 的分隔字符向量列