python之sys系统模块

python之sys系统模块

python之系统模块——sys

常用如下

sys.argv        #命令行参数list.第一个元素是程序本身路径
sys.exit[n]        #退出程序，正常退出时exit[0]
sys.version        #获得python解释程序的版本信息
sys.maxint        #最大的int值
sys.path        #返回模块的搜素路径，初始化时使用pythonpath环境变量的值
sys.platform    #返回操作系统平台名称

示例如下

>>> import sys
>>> sys.version
'3.6.8 (default, Nov 16 2020, 16:55:22) \n[GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]'
>>> sys.path
['', '/usr/lib64/python36.zip', '/usr/lib64/python3.6', '/usr/lib64/python3.6/lib-dynload', '/usr/local/lib64/python3.6/site-packages', '/usr/local/lib/python3.6/site-packages', '/usr/local/lib/python3.6/site-packages/cloud_init-19.1.11-py3.6.egg', '/usr/lib64/python3.6/site-packages', '/usr/lib/python3.6/site-packages']
>>> sys.platform
'linux'


# cat sys_copy.py
#!/bin/python3
# -*- coding: utf-8 -*-
import sys
src_file=sys.argv[1]
dst_file=sys.argv[2]
with open (r'%s' %src_file,mode='rb') as read_f,\
    open (r'%s' %dst_file,mode='wb') as write_f:
        for line in read_f:
                write_f.write(line)
# python3 4.py
源文件路径：1
目标文件路径：1.html


# cat 3.py
#!/bin/python3
# -*- coding: utf-8 -*-
import sys
src_file=sys.argv[1]
dst_file=sys.argv[2]
with open (r'%s' %src_file,mode='rb') as read_f,\
    open (r'%s' %dst_file,mode='wb') as write_f:
        for line in read_f:
                write_f.write(line)

# python3 3.py py.py  4.py
#cat 4.py