python shell script code example

Example 1: executing shell commands from python script

import subprocess
subprocess.run(["bash", "testShell.sh"])
#we don't have to give full path to the shell script. It always execute from the current directory

#As a rule of thumb, you need to separate the arguments based on space, 
#for example ls -alh would be ["ls", "-alh"], while ls -a -l -h, 
#would be ["ls", "-a", -"l", "-h"]. As another example, 
#echo hello world would be ["echo", "hello", "world"], 
#whereas echo "hello world" or echo hello\ world would 
#be ["echo", "hello world"].

#Another example.
list_files = subprocess.run(["ls", "-l"])
print("The exit code was: %d" % list_files.returncode)

Example 2: python run command

import os
os.system('cmd /k "Your Command Prompt Command"')

Example 3: how to run a python script

# Save the script in a file with .py extension
# run the script using the below command
python fileName.py

Example 4: run python.py file

# save a file in text editor with .py
# open terminal, and change directories
# run the following command:
python3 file.py

Example 5: python script example

# Import the modules
import sys
import random

ans = True

while ans:
    question = raw_input("Ask the magic 8 ball a question: (press enter to quit) ")
    
    answers = random.randint(1,8)
    
    if question == "":
        sys.exit()
    
    elif answers == 1:
        print "It is certain"
    
    elif answers == 2:
        print "Outlook good"
    
    elif answers == 3:
        print "You may rely on it"
    
    elif answers == 4:
        print "Ask again later"
    
    elif answers == 5:
        print "Concentrate and ask again"
    
    elif answers == 6:
        print "Reply hazy, try again"
    
    elif answers == 7:
        print "My reply is no"
    
    elif answers == 8:
        print "My sources say no"

Example 6: call shell script from python

import subprocess
subprocess.call(["./shell.sh"])

# Make sure that "shell.sh" has "+x" permissions