os模块

os模块存放于Lib/os.py中

import os
print(os.environ)               #获取操作系统里设置的环境变量
print(os.getcwd())              #返回表示当前工作路径的字符串
print(os.system('ping 127.0.0.1'))  #在子shell中执行命令(command 为一个字符串) os.system(command)
print(os.urandom(10))               #获取一适合加密使用的10(n)字节大小的随机数字字符串
#===========执行结果
# environ({'ALLUSERSPROFILE'---------省略  太长了)
# C:\Users\86176\Desktop\BOOK\function
# 
# ???? Ping 127.0.0.1 ???? 32 ????????:
# ???? 127.0.0.1 ????: ???=32 ???<1ms TTL=64
# ???? 127.0.0.1 ????: ???=32 ???<1ms TTL=64
# ???? 127.0.0.1 ????: ???=32 ???<1ms TTL=64
# ???? 127.0.0.1 ????: ???=32 ???<1ms TTL=64
# 
# 127.0.0.1 ?? Ping ??????:
#     ?????: ????? = 4??????? = 4????? = 0 (0% ???)??
# ?????г????????(????????λ):
#     ??? = 0ms???? = 0ms????? = 0ms
# 0
# b'8:\x1b\xf5\x87J\x0b\xb6\x82R'