Using the SH library to execute shell commands

Execute shell command in Python

The previous execution of the shell command is mostly done by Os.system (Shell command), which is more cumbersome.

Understand that SH is a better library than subprocess, capable of executing shell commands

1. View IP:

[Email protected] myblog]# ifconfig
Eth0:flags=4163<up,broadcast,running,multicast> MTU 1500
inet 172.31.253.193 netmask 255.255.240.0 broadcast 172.31.255.255
Ether 00:16:3e:01:72:ac Txqueuelen (Ethernet)
RX packets 235322 Bytes 231762359 (221.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 78402 Bytes 15382388 (14.6 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Complete with SH:

in [+]: from SH import ifconfig

in [+]: Print ifconfig ("eth0")
Eth0:flags=4163<up,broadcast,running,multicast> MTU 1500
inet 172.31.253.193 netmask 255.255.240.0 broadcast 172.31.255.255
Ether 00:16:3e:01:72:ac Txqueuelen (Ethernet)
RX packets 236463 Bytes 231849592 (221.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 79234 Bytes 15505613 (14.7 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

2. View the files in the/app directory:

In []: Print Sh.ls ("/app")
git-2.14.1 MyBlog pyinit.py v2.14.1.tar.gz

in [+]: Sh.ls ("-L", "/app")
OUT[27]:
Drwxrwxr-x root root 24576 9?. 20:52 git-2.14.1
Drwxr-xr-x 6 root root 4096 9?. 21:53 MyBlog
-rw-r--r--1 root root 273 9?. 20:43 pyinit.py
-rw-r--r--1 root root 6983655 9?. 20:48 v2.14.1.tar.gz

See how many files are under/app:

in [+]: SH.WC (Sh.ls ("-L", "/app"), "-L")
OUT[28]: 5

3. Save the file under/app to the list:

In [All]: List=sh.glob ('/app/* ')

in [+]: List
OUT[43]: ['/app/git-2.14.1 ', '/app/v2.14.1.tar.gz ', '/app/pyinit.py ', '/app/myblog ']

4. Piping:

In [Sh.sort]: Print (Sh.du (Sh.glob ('/app/* '), '-SHC '), '-rn ')
397M?.?
378m/app/git-2.14.1
13m/app/myblog
6.7m/app/v2.14.1.tar.gz
4.0k/app/pyinit.py

Using the SH library to execute shell commands