python之sys模块【获取参数】 - 好文

<>sys模块：system指的是解释器（os指的是操作系统）
<>常用操作：用于接收系统操作系统调用解释器传入的参数 <>实验操作：
在python工具中敲入以下代码：
import sys
print(sys.argv)
#获取脚本名称 sys.argv[0]
print(sys.argv[0])
#获取脚步传递的第一个参数：
print(sys.argv[1])
#获取脚本传递的第二个参数
print(sys.argv[2])
在命令行中运行：
运行成功

import os import sys print(sys.version) # 作用：根据python版本编写符合不同版本的程序使程序可兼容 if
sys.version[0] == '2': print('running in python2...') elif sys.version[0] ==
'3': print('running in python3...') # 返回模块的搜索路径，初始化使用PYTHONPATH环境变量
print(sys.path) # 可以实现跨平台 print(sys.platform) if sys.platform == 'linux':
os.system('ifconfig') else: os.system('ipconfig') 3.6.4 (default, Aug 10 2018,
11:14:49) [GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] running in python3...
['/home/kiosk/PycharmProjects/2019python',
'/home/kiosk/PycharmProjects/2019python',
'/usr/local/python3/lib/python36.zip', '/usr/local/python3/lib/python3.6',
'/usr/local/python3/lib/python3.6/lib-dynload',
'/usr/local/python3/lib/python3.6/site-packages',
'/usr/local/python3/lib/python3.6/site-packages/Twisted-17.1.0-py3.6-linux-x86_64.egg',
'/usr/local/python3/lib/python3.6/site-packages/Automat-0.7.0-py3.6.egg',
'/usr/local/python3/lib/python3.6/site-packages/constantly-15.1.0-py3.6.egg',
'/usr/local/python3/lib/python3.6/site-packages/zope.interface-4.5.0-py3.6-linux-x86_64.egg',
'/usr/local/python3/lib/python3.6/site-packages/attrs-18.2.0-py3.6.egg'] linux
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.25.1.250
netmask 255.255.255.0 broadcast 172.25.1.255 inet6 fe80::221:ccff:febf:7aa6
prefixlen 64 scopeid 0x20<link> ether 00:21:cc:bf:7a:a6 txqueuelen 1000
(Ethernet) RX packets 1205 bytes 105121 (102.6 KiB) RX errors 0 dropped 0
overruns 0 frame 0 TX packets 528 bytes 35864 (35.0 KiB) TX errors 0 dropped 0
overruns 0 carrier 0 collisions 0 enp0s25:
flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 ether 00:21:cc:bf:7a:a6
txqueuelen 1000 (Ethernet) RX packets 1208 bytes 127129 (124.1 KiB) RX errors 0
dropped 0 overruns 0 frame 0 TX packets 520 bytes 41576 (40.6 KiB) TX errors 0
dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 20 memory
0xf2500000-f2520000 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1
netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1
(Local Loopback) RX packets 245 bytes 102297 (99.8 KiB) RX errors 0 dropped 0
overruns 0 frame 0 TX packets 245 bytes 102297 (99.8 KiB) TX errors 0 dropped 0
overruns 0 carrier 0 collisions 0 privbr0: flags=4099<UP,BROADCAST,MULTICAST>
mtu 1500 inet 172.25.250.250 netmask 255.255.255.0 broadcast 172.25.250.255
ether 52:54:00:9e:c5:d4 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors
0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0:
flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.122.1 netmask
255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:22:42:bc txqueuelen 1000
(Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame
0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0
collisions 0 virbr1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether
52:54:00:0f:6b:dc txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX
errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0
dropped 0 overruns 0 carrier 0 collisions 0 wlp3s0:
flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.20.10.10 netmask
255.255.255.240 broadcast 172.20.10.15 inet6
2409:8970:4c0:3ed0:d8ef:2aed:6f41:c3c2 prefixlen 64 scopeid 0x0<global> inet6
fe80::2639:b9e9:1df5:6e4d prefixlen 64 scopeid 0x20<link> ether
8c:70:5a:41:61:ac txqueuelen 1000 (Ethernet) RX packets 49988 bytes 34571452
(32.9 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 47976 bytes
8449382 (8.0 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
<>--------------------练习--------------------

在命令行中，比较两文件的不同
import difflib import sys if len(sys.argv) !=3: print( """ Usage: %s 比较的文件1
比较的文件2 """%(sys.argv[0]) ) else: filename1 = sys.argv[1] filename2 =
sys.argv[2] try: with open(filename1) as f1,open(filename2) as f2: content1 =
f1.read().splitlines(keepends=True) content2 =
f2.read().splitlines(keepends=True) except Exception as e:
print('比较错误，错误的原因',e) d = difflib.HtmlDiff() htmlContent =
d.make_file(content1,content2) with open('different.html','w') as f:
f.write(htmlContent)

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