Have a very limited expertize in Python but have a pressing need to edit some fields in exth of existing azw3.
Looking at mobi_split code I found all function needed for editing mobi file and saving result to azw3, that is read_exth, del_exth, and add_exth.
In my case I don't have mobi but have only azw3 file.
Could you give me some general ideas how can I apply the same tools that class mobi_split provides (sure only if they are applicable) to simple azw3 editing?
I just need to add 501, and modify 202 with content of 201.
Added:
Found
this and understood that solution is not that easy nut to crack...