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All right.

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We have just successfully pulled the python imager.

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It is around 1 gigabyte in size.

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And afterwards we hope read that the python container and inside of the interactive session with Python

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interpreter we executed some Python commands.

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Now it's a good time to create the very small tiny python program and run it inside of the Python container

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and let us simply print Hello from Python container to the terminal.

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Very simple application let's create the new folder inside of the container folder.

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Let me clear terminal here and let's do the visual studio code.

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Let's close in this similar file.

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We don't need it anymore.

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Collapse and Gen X do folder.

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We don't need it anymore as well.

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And here let's create new folder by clicking on this icon and please make sure that you will create

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a new folder near and Gen X folders and let's type here by then name for new folder and inside of this

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folder list create new file.

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Please select this folder with your mouse and create your file like so.

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And the new file name will be simply Hello World NPI.

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And next Let's type here one line.

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Let's install also extension that is recommended for this file type.

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It will be installed automatically by the US Code.

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And meanwhile Wild is installing the let's hide this left pane and type here one single line of code

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print.

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And here will be a hello from the Python container because we will run this code inside of the Python

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container.

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Let's save the file.

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Come on s let me basically close those pop ups and the next.

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Let's try it to execute this file.

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Hello role would be using Python interpreter inside of the Python container.

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Let's go to terminal and the let's see deed to Python folder.

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I am currently in containers folder city to buy it on and if I list files here I will see only one file

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Hello rolled by.

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Now let's create new Python container and let's try it or run this file there.

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Let's put it in the following way.

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Let me clear.

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Terminal.

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Let's use Docker run command.

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That's 18.

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And next comes name of the image by them.

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And now somehow we need to tell Python which file it must execute and this file is located on our computer

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and it is located basically in this folder where we are currently running docker container.

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But how we're able to tell container which file it should execute answer was very simple.

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Often name of the image here.

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We could specify a command custom command that will be executed instead of the built in default command

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request that the default command for this container is Python 3.

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And one container is started without any additional options like.

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So as you see now on the screen then Python 3 process will be started.

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But instead we want to execute Hello rolled by a file using by the three interpreter.

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And for that we could simply type here comment that we want to execute after Image Name Python 3.

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And here we'll be the name of the file.

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Hello.

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This rolled not by Let's not press enter and see what will happen.

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Enter and I see error Python 3 can't open the file Hello rolled.

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Goodbye.

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No such file or directory.

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Now please stop this video and try to find out the reason why we get this error.

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Please note that you already have knowledge how to fix this problem just try to think about that a bit

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please post this video and fix this error

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let's do that together.

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Answer is very simple.

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This command Python container tries to execute inside of the container.

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And it looks for Hello rolled by a file inside of the container.

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But now this file is located locally on our computer.

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Here is this file and in order to transfer this file to a container we need to create volume mapping.

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Same as we did with engine these containers.

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Do remember that.

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Let's do that no longer run this item.

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And next comes volume.

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Option desk view here.

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I could use either absolute path to current folder Python folder that has Hello rolled by a file or

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I could use.

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Same as before.

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B w d variable.

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Let's use variable dollar assign B W.

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Next comes column.

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And afterwards we need to specify absolute path to internal folder inside of the container.

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Recall that with engine X we have used actually default folder that was used for separating the different

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files to clients but in such case we are actually able to use any folder you like we could use even

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root folder but it's not a good practice to do so.

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This way let's use a custom folder name for example slash up like so you could use any folder name you

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like here and next comes name of the image.

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Same as in this command in our case python.

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And afterwards let's override default Python 3 command with custom command by then 3 and here we'll

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be at name of the file.

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Hello.

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This rolled dot my question to you.

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Will it work or not.

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Let's try it.

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Press enter again can't open file Hello rolled the API could you please find error in this comment.

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If so please fix it yourself.

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Great.

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Let's fix it together.

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And here instead of simply Hello World.

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We need to specify path to Hello world API instead of the container.

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Here we have mapped this folder to this folder and that's way here before.

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File Name.

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We need to specify slash up like so because now.

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Hello world.

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A file will be mapped from local folder by them into the app folder inside the container.

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That's why here we need to specify this folder name as well.

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Let's now execute this command enter.

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And now I see Hello from the Python container.

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Finally it works as expected.

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Also we're actually able to get rid of this folder of graphics here by specifying an additional option

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that double your working directory.

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Let's do so.

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Let's modify this command.

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Let me remove up folder here and somewhere here.

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After this the option let's add desk double your option.

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That extends for walking directory.

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And here let us simply type up like so last press enter and they see same result.

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Hello from the Python container.

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That's how we were able to successfully create the python container map volume from our local computer

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to container and execute specific application file inside of the container.

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Next you'll get a small challenge and you will need to create a bit more complicated program using Python

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and executed inside of the Python container challenge task comes next.

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My.