dir
遍历目录
https://baijiahao.baidu.com/s?id=1628526268315022280&wfr=spider&for=pc
https://www.runoob.com/python/python-if-statement.html
获得当前绝对路径
Python print(os.getcwd())
print(os.path.abspath(os.curdir))
print(os.path.abspath("."))
输出.
改变当前路径
Pythonos.chdir('D:\Program Files')