Python Tutorials
Basics in Python
Introduction of Python
Keywords in Python
Data Types in Python
Hello World Program in Python
Add Two Numbers in Python
Input from User in Python
Decision Making
If Statement in Python
If and Else Statement in Python
If and Else If and Else Statement in Python
Calculator using If Statement in Python
Loops
While Loop in Python
While Loop User Input in Python
Triangle using While Loop in Python
For Loop in Python
For Loop using Continue in Python
Do While Loop in Python
Functions
Functions in Python
Calling Function inside Function in Python
Passing Arguments to Function in Python
Passing Arguments to Function and Return in Python
Calling Function of Custom Python File in Python
Arrays
Array in Python
Find Min and Max Number in Array in Python
Sorting Array Elements in Python
User Input in Array in Python
Two Dimensional Array in Python
Classes
Classes in Python
Passing Arguments in Class in Python
Default Constructor in Class in Python
Working with Multiple Classes in Python
Inheritance
Inheritance in Python
Passing Arguments in Inheritance in Python
Multiple Inheritance in Python
Polymorphism
Polymorphism in Python
Exception Handling
Exception Handling in Python
User Defined Exception in Python
Data and Time
Data and Time in Python
Data and Time Format in Python
File Handling
Read Text File in Python
Write Text File in Python
Create and Delete Directory in Python
Searching File and Listing Directories in Python
Working with File Properties in Python
File Opening Modes in Python
More Examples
Working with Sleep in Python
Multithreading in Python
Open Computer Application in Python
Open File using Specific Application in Python
Open and Close Computer Application in Python
Encoding and Decoding Text in Python
Working with JSON in Python
Working with String in Python
Crawler and Scraping
Website Crawler in Python
Scraping Data from Website in Python
Scraping Data and Saving in Text File in Python
Scraping Data and Saving in MySQL Database in Python
Scraping Data from AJAX Based Website in Python
Scraping Data by Category and Page Number in Python
Login to Website in Python
Login to Scrap Data and Send to Server in Python
Library Functions
Built-in Functions in Python
Modules in Python

Open and Close Computer Application in Python

In the following programs you will learn that how to open and close computer application. And how to print text file text on Printer.

Program Opening Computer File and Closing

Program 

import subprocess
notepadProcess = subprocess.Popen("Notepad")
while notepadProcess.poll() is None:
    print('still running')
    reply = input("Kill process ? (type yes) ")
    print('>>|'+reply.strip()+'|<<')
    if reply.strip()=='yes':
        print("closing process")
        notepadProcess.terminate()
Output
still running
Kill process ? (type yes) yes
>>|yes|<<
closing process
still running
Kill process ? (type yes) yes
>>|yes|<<
closing process

Program Closing Computer Opened File

Program 

import os
os.system("TASKKILL /F /IM notepad.exe")
Output
SUCCESS: The process "notepad.exe" with PID 8472 has been terminated.

Computer Shut Downing

Program 

import os
print("Start process to shut down computer")
os.system("Shutdown -s") #Shutdowning Computer.
Output
Start process to shut down computer
...
Printing Text of Text File on Printer
Program 

import os
print("Start process to print text of MyTxtFile text file")
os.startfile("C://MyTxtFile.txt", "print")
Output
Start process to print text of MyTxtFile text file
...
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