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[no audio]

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Hi friends, here

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we are going to write very simple Python Script, and that

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is simply printing some message.

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So here I am going to print "Hello World!"

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using your Python Script, and what about the script you are

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going to write? That I am going to write using 'vim', and 'Default IDLE'.

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So here we are going to see a simple Python Script

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by using either 'vim' editor, or 'Default IDLE', right.

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Let me open first of all

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my command line on my Windows operating system.

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You can write same program, same script on your Linux or any

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Unix-like systems as well, right?

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So guys I'm moving into my desktop, there

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I am going to create 'PythonScripts' directory.

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Let me enter into that. See as of now

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you don't have anything in this directory.

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Right. See if you want to use 'vim' editor,

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first of all you should have 'vim' on your host.

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So in our previous video we have seen different types of

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editors, and I have given a link to install 'vim' editor on your

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Windows operating system.

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Anyway by default 'vi' is there on your Unix-like systems.

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You can use 'vi' on your Unix-like systems. But in Windows

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you don't have 'vi', but you can install 'vim', right?

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So I already installed that. Now

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let me run 'vim', simply 'hello_word.py'. You can take any

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name guys, any script name you can take, and extension is '.py'

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just to know that that is a Python Script or Python program.

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Now, let me enter 'vim ', some program name '.py'.

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Right. Now I am going to open your 'vim' editor.

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I opened that, right. See guys my intention is I have to write a

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some Python Script or Python program, and if I run that program

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I have to get output as simply some "Hello World!", right.

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So to print the something, to print some text or message or

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string in your Python

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you have to use 'print', simply parentheses, in double quotation

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you have to write your text, or message,

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or string, whatever you want to print through your Python

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program. That's it.

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So 'print', parentheses,

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then inside parentheses with quotations you have to write

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some string or message or text.

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Right. Now, let me save this.

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First observe your script, whatever you have.

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So this is our script, right?

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So this is like in Windows 'cat' command, right?

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I am seeing my file, my program, my script.

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Yes, this is the line in my program.

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Okay. So now I am going to run it 'python',

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so guys if you want to run your script Python Script, you have

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to run in this way on your Windows operating systems, 'python ',

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your program name. But before going to that check it

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whether you configured your Python on your host or not.

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Yes, I am getting some version, means

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I have a Python on my host,

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and that version is some 3.7.0.

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Now I can use 'python

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hello_word.py'

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See the output. You're getting 'Hello World!'.

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[no audio]

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Right. See guys, here

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you have to understand one more thing, while running you are

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running in this way 'python hello_word.py',

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some program name, '.py'. Now as of now, I am using

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Python 3, right.

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So if I want to run same program with Python 3, so already

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I have somewhere in my host Python 2 as well.

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Right. Let me run with Python 2.

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[no audio]

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So you have to provide complete path because you can't add

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two paths to your system paths,

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that's why I am selecting Python 3 as the default one, and

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for Python 2 whenever if I want to run my Python Script

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with Python 2 I will provide the complete path for my

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Python 2 version.

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So my Python 2 is there in this location. If you want to check

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you can check 'version'.

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Right. Now if you want to run your script using Python 2

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just provide complete path where you installed your Python,

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then your program name, or script name. See that?

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[no audio]

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That's it.

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Okay. And guys whatever we've written, right, that script

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we are running from command line.

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So this is the first thing you have to know, because as an

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automation engineer you how to run your scripts from command

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line. We already discussed this point.

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Fine. So guys if you want to write one more line, so I want

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to print output like "Hello World!" or "Welcome to Python",

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so this is in one line.

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I want to print one more line. Then 'print', in quotations whatever

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you want to print you just write that information here.

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So I am writing,

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"Welcome to Python Scripting".

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If you want to write one more line, let's say 'print(

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"This is my first script").

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So now through our Python Script

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we are printing three lines of information with the help

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of this script.

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Let me save it, and observe the output.

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I mean first observe your script, now run it,

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[no audio]

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'Enter'. See

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the output. Whatever you have inside of your 'print', inside

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of your quotations,

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that information is printing.

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And guys whenever if you run your Python program, it will

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run from top to bottom, line by line, right. Very first line

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"Hello World!", first

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this information will be printed, then this one, then this one.

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Right. So this is a simple script with your Python and here we've written

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our script with the help of 'vim', and we are running that

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with Python 3 as well as Python 2 also, right.

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So guys if you are having confusion like running simply by

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'python', or by providing complete 'python' path, right,

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just try to install only one Python on your host, and set

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the path for your Python, and just try to work with that only.

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Right. In case if you have both the Python versions on your

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host just provide your, just add your 'python' path to your

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system path for only anyone of the Python versions, it maybe 2 or 3,

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right, and come to command line, and just type in this way.

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suppose here if you are getting 3.7.0 then by default you're running

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your Python programs with the help of Python 3 version.

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So if you want to run this program with any other version

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just try to provide complete path of your Python Interpreter.

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That is nothing but 'python.exe'.

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Of course, no need to provide '.exe', by default

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it will take '.exe' extension because you are on your

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Windows operating system.

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That's it.

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Okay. And here guys, I need to provide one more clarity. Observe

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that in your script, right,

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this entire thing is a string or text or message, right?

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Actually, this is a string. If you want to print any string on your

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command line while running your program always you have to

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take a 'print'. See here,

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this is a number, right? Number is also a string if you provide

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inside of your quotation.

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String is nothing but group of characters.

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If you write anything inside of quotations, that will be

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a string, that is always a string. If you write anything inside

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of quotations that is always a string.

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So 'print' is used to simply to print some string on your command

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line, on your terminal, on your display while running your

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program, while running your script.

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Right. Fine. So till now we worked with

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'vim' editor from command line.

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We know once if we install your Python, right, by default

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you will get 'IDLE'. Let me click this 'IDLE'.

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Right. Let me open that 'IDLE'.

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[no audio]

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It's opening.

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Yeah, it's done. Right. Now,

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you can go with the 'File', and 'New', and whatever the program

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you have, whatever the script you have just copy and paste

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it or you can type it, and save it.

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[no audio]

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Okay. You can save it anywhere, right, otherwise go with 'File',

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and 'Open' your existing Python program.

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So already we have on our Desktop somewhere here

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we have some 'hello_word'.

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Now this is the program, right. Now,

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let me close this.

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Now this is your script, so you can run this from here also.

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See the output you're going to get.

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So guys, you can also write your Python scripts or programs

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by using IDLE also. So for that what you have to do? Just

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to go to your 'Start', and then click on 'IDLE'. It will open

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this 'IDLE', right, Python Shell. Click on 'File->New' in case

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if you want write a new Python program, or if you have some

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existing Python just click on 'Open' and select your Python

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program from your particular location.

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Then it will open like this, then go and run here using 'Run'

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module, or from your keyboard

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you can also click on 'F5' so that your program will run.

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[no audio]

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So guys my suggestion is, just try to know about IDLE, but

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don't use this 'IDLE'. If you want to use you can use it.

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But my preference is command line 'vim' editor,

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or 'vi' editor on your Unix-like systems.

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'vi' or 'vim', that's it. You can take anything.

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Okay. So guys, this is the simple way to write simply

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"Hello World!", or any to print some message with the help of your

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Python. Okay.

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Okay guys. Thank you for watching this video.

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[no audio]