First of all, please forgive me for my English is not good, but I have encountered problems in using openpyxl, I hope to be resolved.
I have the same problem as [
I see your reply is "Duplicate of #365."
#365 solves the solution of creating merged cells using python. Suppose I created an excel file using Miscrosoft Excel, which includes a merged cell with a border. When I edit the file using the python program, I call the save() method, and the original border of the merged cell is lost.