13 os.path.abspath 获取绝对路径
path = '20190409_192149.mp4' # D:\code\s21day14\20190409_192149.mp4
import os
v1 = os.path.abspath(path)
print(v1)
path = '20190409_192149.mp4' # D:\code\s21day14\20190409_192149.mp4
import os
v1 = os.path.abspath(path)
print(v1)