os.path.join()

os.path.join()会忽略第一个绝对路径之前的参数！

示例：

>>> import os
>>> os.path.join('/home', 'mushroomer')
'/home/mushroomer'
>>> os.path.join('/home', '/mushroomer')
'/mushroomer'
>>> os.path.join('/home', './mushroomer')
'/home/./mushroomer'

 参考资料：https://docs.python.org/3.7/library/os.path.html?#module-os.path