python sys模块

sys.argv   命令行参数List，第一个元素是程序本身路径 以列表表示

import sys
print(sys.argv)         

['C:/Users/Administrator.QH-20170325TNQR/PycharmProjects/SS/day5/sys mod.py']

sys.path    返回模块的搜索路径，初始化时使用PYTHONPATH环境变量的值

['C:\Users\Administrator.QH-20170325TNQR\PycharmProjects\SS\day5', 'C:\Users\Administrator.QH-20170325TNQR\PycharmProjects\SS', 'C:\Users\Administrator.QH-20170325TNQR\AppData\Local\Programs\Python\Python36\python36.zip', 'C:\Users\Administrator.QH-20170325TNQR\AppData\Local\Programs\Python\Python36\DLLs', 'C:\Users\Administrator.QH-20170325TNQR\AppData\Local\Programs\Python\Python36\lib', 'C:\Users\Administrator.QH-20170325TNQR\AppData\Local\Programs\Python\Python36', 'C:\Users\Administrator.QH-20170325TNQR\AppData\Local\Programs\Python\Python36\lib\site-packages']

sys.version 获取Python解释程序的版本信息

3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)]

sys.platform 返回操作系统平台名称

win32

sys.path.append  添加环境变量 添加到sys.path列表路径