什么是 python sys 模块

# -*- coding: utf-8 -*-
"""
Created on Fri Jan  5 23:24:34 2018
自定义文件库命名,然后转出
@author: BruceWong
"""
 
import os
import sys
print(sys.argv)
print('the script name is:',sys.argv[0])
if len(sys.argv) > 1:
    print("there are", len(sys.argv)-1, "arguments:")  # 使用len(sys.argv)-1采集参数个数-1为减去[0]脚本名称
    for arg in sys.argv[1:]:            #输出除了[0]外所有参数
        print(arg)
else:
    print("there are no arguments!")
'''
the script name is: C:/Users/BruceWong/.spyder-py3/selfdone/自定义文件库命名.py
there are no arguments!
'''