Python: 如何將folder_name, file_name合併為file_path? fpath = os.path .join(folder, fname) ; “\\”.join([folder, fname]) ; 如何將file_path拆分出folder?

import os

folder = r"C:\Temp"
fname  =  "test.txt"

fpath = os.path.join(folder,fname)
print("file path:", fpath)

lis = fpath.split("\\")
#['C:', 'Temp', 'test.txt']

fpath2  = "\\".join(lis)
print("file path2:", fpath2)

folder2 = "\\".join(lis[0:-1])
print("folder2:", folder2)