All language subtitles for 12. Importing Modules

OK.

We are moving into.

I don't want to call it advanced python.

I just want to say more advanced than where we were before.

If previously we were in a one to one class or moving kind of into some one of two material I wouldn't

even call it to a one material.

This is just more advanced beginner stuff.

How about that.

So what we're gonna do is we're gonna go ahead and start a new script.

That way we can kind of have our new one or two section here and kind of improve upon what we've been

doing a little bit.

So what I want you to do is I just want you to get it and we'll just call this new script that pie a

little ampersand at the end as usual and we're just going to declare our bean bean Python three here.

I can type it out bean Python 3 and we're going to go ahead and talk about our first concept which is

going to be importing so importing is important.

When we say importing modules are existent in Python writes in we have a lot of them built in but there

are these modules that are not built in but available to us.

For example a module called CIS now CIS does a lot of important things CIS has to deal with anything

related to system functions and parameters one system function and parameter that we can do is something

like printing out the version of Python that we're running.

So you could say print this version.

Okay.

Now if we go to do that and we say save and we just go ahead and say Python 3 new script up high you

could see the name of CIS is not defined so we're getting an error here.

Well that's because we haven't imported it.

So we can do is we can say import CIS and up here we can go ahead and just give this a nice comment

next to it and we going to say that CIS is a system a function and parameters.

OK and then let's go ahead and save this and now let's go and run it again.

Now you can see that we are running Python three point seven point five RC one and we have now successfully

printed this out.

Why did this work this work.

Because CIS does not by default come imported some items already built in by default.

So this is not one of them but this is very important and we're going to use it over and over again.

So you're gonna see it a lot.

One of the most frequent if not the most frequent along with OS is another one import os you're going

to see a lot of that over and over.

So why are we going to see this.

Well we have things like arguably so our v is arguments.

So when you think about from the bash a lesson like dollar sign one when we had an argument and we were

doing our ping like our script at S H and we had our IP address here as dollar sign one.

Something along those lines.

Well those are the same thing we just call it our v in Python.

That's something.

Another thing is if we want to say sis that exit which you're going to see again later in this course

we do assist that exit that exits Python cleanly.

We need a system exit.

So you're going to see sis quite repeatedly on top of this.

There's more things that we can do with modules.

Let's go ahead and delete this and let's say that we wanted to import another module called Gate time.

Now this does exactly what you think it does but what if we wanted to import a specific part of date

time we didn't want to import the whole thing.

We just want to import one module.

We can say from the date time import date time so we can do the same thing with CIS we can import a

specific part of this or we can import all of this.

So at day time we're importing a specific part of it.

Right.

And we can do something like print date time dot now something like that and it should print us the

date time.

So do this.

You can see now today's date is 11 16 20 19.

And what time we're recording so we can also do another nifty feature when it comes to importing we

can import with aliases so instead of from date time import date time we can say import date time as

something like D.T..

You could say import with alias and instead of having to write date time that now over and over and

over something like that we can just write D.T. is shorter.

We know what it means and we know how to write out date time which is kind of lengthy.

So credit again you can see it still works.

So importing is important.

I'm going to say it again.

You need to know that we're going to be importing certain modules out of Python.

Most of these are built in their occasional times you're going to have to go out and download something

and put it in your library and import it that way.

But for this course that we're doing you're only going to be importing from things that are pre existing

with Python.

So not everything is automatically ready to go.

Sometimes you have to import things in order to improve upon your script or do make it do what you want

to do.

So we're going to build off of this when we start writing our scripts and you're going to see this repeatedly.

You're going to also see this again when we do our exploit development part of the course.

So let's go ahead and move on.

We're going to move on to some advance strings and we're going to get close to wrapping up here and

start building out some cool little python scripts.

So I'll see you over in the next video.