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[no audio]

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Friends, here we are going to discuss about 'getpass' module.

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See this 'getpass' module consists of two important functions,

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they are 'getpass()' and 'getuser()'.

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See you know that if you want to see what are the different

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functions are there with your module what you have to do?

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Simply first enter into your Python, then try to import that

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module, 'getpass'. But I am giving some wrong module name

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'getpasspass', something. See that what you're getting output

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as, 'ModuleNotFoundError:'.

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No module name called your 'getpasspass' because not only

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this, if any module is not present with your Python software,

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it will throw this error.

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Right. If this module is there, then it won't give any error. Then immediately

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we know that we can run 'getpass', 'dir' of that, so that it is

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going to list all your functions and variables which are

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there with your module.

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But if we observe here, there are two modules, two functions

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with this. They are like 'getpass' and 'getuser'.

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These are very, very important from this 'getpass' module. Right.

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See that. Then what is the usage of 'getpass()'?

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See, generally to read some string we are using 'input' syntax

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in your Python, and with 'input' syntax, whatever you are typing

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on your command line,

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I mean while providing 'input' it is displaying on your terminal.

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Let me write simple Python script first.

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My intention is,

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[no audio]

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I want to read a password, 'read_pass'.

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Right. For that I am going to write a simple Python script. Be clear. Here

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my intention is, I want to read a password. See you know that

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whenever if you are reading a password while typing

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that password on your command line, if you don't display

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then that is good. Right.

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First of all, let me do one thing. 'my_pass' or some 'db_pass'

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I am taking. 'db_pass = input("Enter your password:)'.

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[no audio]

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Right. Let me save it and run it.

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[no audio]

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So, I'm going to run this script, 'read_pass.py'. "Enter your

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password: ". I'm entering suppose some password, "db123" password.

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So actually, if it is password try to avoid displaying your

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password while typing on your command line, then that is

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a good practice.

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But with your normal 'input' syntax, you can't do that.

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Right. That's why what I am doing is, see that, what I am doing.

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I am going to import a module called.

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[no audio]

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Let me comment this line, or no problem just delete it.

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Try to import first 'getpass' module.

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Then I am going to read 'db_pass'. First observe the code.

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'getpass.getpass', right? That's it.

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[no audio]

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Now see that, I am going to run this script.

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Right. Let me run it.

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I am running.

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See, it's asking by default 'Password:' as the prompt,

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but I am typing here you are not able to see that.

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Done. So, whatever you are typing, in case if you want to see just

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for verification, just for verification after reading just

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try to print that, so that it will be

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[no audio]

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clear to understand this.

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Right. So 'print', I will do one thing.

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[no audio]

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"The entered password is :". Right. I'm going to print that, so

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that I can get clarity whether it is reading password or not, right?

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Now let me run this.

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So, I'm going to run it.

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What happened?

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Okay, I started with single quotation,

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sorry, double quotation and ended with the single quotation

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in your 'print' statement.

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So, now it's good.

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[no audio]

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Now I am running. See the output.

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First of all, it is asking 'Password: '. Guys,

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it's bad to see code as well, right?

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[no audio]

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'read_pass.py', this is your code. What you are doing?

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Very first you are importing 'getpass'. Why I am importing

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this 'getpass' module? Because I'm using that in my code,

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that's why before using always you have to import.

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Yes, I did it.

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Now, this is like your 'input' syntax only. You have 'input', right,

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same way 'getpass.getpass()', with parentheses.

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This is a function. Now, because of this, right, what you are going to

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get is, you're going to get some prompt, that is 'Password: '.

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Now, I'm entering 'db', some password. See the result. Now,

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let me rerun, and I'm going to provide, suppose

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let's say 'python' as password. That's it.

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So, while giving your password to your script you are not

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displaying that, you are not echoing on your terminal. That

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is actually good practice whenever if you are providing password.

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Right. Fine.

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Now, see by default your 'getpass' is giving prompt as 'Password: ',

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but instead of 'Password: ', if you want to provide any other

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prompt, yes, you can provide it. Right. See for that

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what you have to do is, nothing is there. Simply write,

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'prompt = "Enter your db pass:"'.

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[no audio]

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That's it. Now, let me save it and run it.

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[no audio]

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And see the output now what you are going to get. "Enter your

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db pass: ". By default 'getpass' is giving prompt as 'Password:',

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but if you want to change your prompt you can change it in this way.

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That's it.

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Right. So, this is the way to read your password in your real time.

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Right. See guys, whatever the code you are having here same code

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you can run on your Unix-like systems as well.

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Let me copy it.

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I am going to open my Linux box.

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See this is Linux, right? Sorry.

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Linux. Now what I am doing is, 'read_pass.py', copy and paste it.

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Save it. Run this. So on my Unix I have given my 'python3' as

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'python3'. Not like Windows, right? Then, yes, it's working, right?

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[no audio]

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But in your Unix-like systems, you know, you have a shebang

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line concept, you can add your Python path at very first line

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in a script in this way. That is '#!', then

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your path of Python, then provide the execution permission

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for your script,

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then you can run now your script in this way, instead of providing

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'python', space, your script name.

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That's it.

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[no audio]

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Right. Fine.

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So, guys that is about 'getpass()' from your 'getpass' module,

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but you are also having 'getuser'.

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So, this is also a function. The purpose of this function

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is, it displays the login name of the user. This function checks

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the environment variables like LOGNAME, USER, and USERNAME,

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in order, in order, right?

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So first it will go and check about LOGNAME.

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Is there any value set for

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LOGNAME variable in your operating system, then it will

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fetch that as a 'username'.

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Then it will go, in case if it is not there, LOGNAME variable

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is not there, or if it is empty then your Python will go and

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check 'USER' variable. Likewise

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it will check all those things, see, and finally it returns

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the value of the first non-empty string.

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See you have here multiple variables from your operating system.

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These all are your operating system variables.

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[no audio]

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So while using this function Python what it will do means,

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Python will go and check this value.

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If this value is set that value it will return, if it is not

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there or if it is empty then by then will go and check 'USER'

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variable, likewise. Right. See that.

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Let me open my terminal here.

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So guys by default if you observe, there is a who, suppose

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in Unix-like systems you have a command called,

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'whoami'. Sorry, 'whoami'. 'ec2-user'.

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So, I logged with this system with 'ec2-user', right. Now

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through Python also you can get it.

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Let me directly show you from your Python terminal.

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So 'import getpass'.

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Let me print or, yeah, 'getpass.getuser()'.

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That's it. See the output.

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[no audio]

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Right. So I'm not sure whether you know this command on your

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Windows or not.

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If you run 'env' command somewhere you have, let me 'grep' it.

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[no audio]

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'grep ec2-user'.

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[no audio]

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See, 'LOGNAME' is there, right,

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[no audio]

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or 'USER' variable is there, right?

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So, what your Python will do means, whenever if you are running

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your command 'getpass.getuser()' from your Python,

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your Python will come to and interact with your operating

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system variables, like 'USER', right, 'LOGNAME', and whatever the

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value we have set for this by your operating system that

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value your Python will display.

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Right. So, guys simply the advantage of your 'getuser()' is nothing

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but automatically you can find out the login user for your

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operating system.

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That's it. Okay.

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So instead of 'getuser() actually 'getpass()' is very, very important

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because just to read your password without echoing while

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typing on your command line, right?

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Okay guys, thank you for watching this video.

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[no audio]