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In this lesson we're going to set up 10 support tensor board is going to run locally on our machine

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and it's going to allow us to track how our training is going.

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Our model is doing how it's evolving and learning as the training progresses and it allows us to easily

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compare different models and their performance.

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Now if you're following along using Google collaborate try notebooks.

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This lesson is going to be a lot less relevant.

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And you're welcome to skip it but if you're running this locally on your machine like the way I am.

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Then follow along with me.

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Let's insert a markdown cell here that's going to read tensor board and maybe parentheses visualizing

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learning that we were going to set up tents board is going to require a couple of steps.

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So tensor board is going to read and write to our disk to our hard disk and it's going to need to know

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where to read and write its files.

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So what we're gonna do is we're going to set up a special folder for all the files that tensor board

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is going to use on our machine and we're gonna set up this folder programmatically in our Jupiter notebook.

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So scroll back up to your inputs and there you should see.

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Import os if you haven't got this added now and can add a couple of more import statements.

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For starters Rasch going to import 10 support.

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So from Caris don't callbacks import tensor board.

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The second thing that we're gonna import is a handy function from the time module so we'll see from

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time import s t r f time.

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This will give us a very quick way of getting the hour and the minute of the current time.

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And you're gonna see how we're going to use this in a minute as well.

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So shift enter on the cell and scroll back down to your constants and we're going to add the folder

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name that we're going to create.

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So we'll call this constant log on underscore score Diaw directory is equal to single quotes tensor

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board underscore C I F A R on the score logs and then we'll put a forward slash at the end we will shortly

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create this folder here in a side project folder.

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So let's hit shift enter on our constants scroll back down to where we're gonna be setting up tents

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aboard and let's write our code for our Folder creation.

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The first thing that we're gonna decide on is a folder name so check it out folder on a school name

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it's gonna be equal to and here will provide a string.

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So it'll be an F string.

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So let's call it model on a score one at.

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And here we're gonna add some curly braces and we're gonna get the current our.

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And the current minute for the time.

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So we're gonna use that s t r f time function and we're going to open some parentheses inside.

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And here we're gonna use double quotes and then we'll have % h space percent.

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And now if this looks very mysterious to you.

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Let's print this out so print folder on a score name and you'll see what this does.

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So if I had shift enter on the cell right now you'll see the string model on a square one at 17 0 6.

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So if you look up here at my time it's Monday 5 0 6.

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Where am I going with this.

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Well I want the current time to be included in my folder name because if I run my code more than once

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then I'll get different sub folders setup.

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Every time I run my model and this allows me to keep track of what I'm doing and what's going on.

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Now I'm actually not going to force you to use the same convention that I'm using him for naming my

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folders if you'd like to pull out a different value from that current time then head over to the documentation

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for SDR f time.

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This is built in into python and scroll down here to this table and here you can see what the different

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parameters are that you can pull out.

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So I've pulled out % h the 24 hour clock time alongside with capital and the minute the zero pad a decimal

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number.

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Now if you want to pull out the second as well you can do that with percent s and if you wanted to pull

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out the weekday or the month then these are the parameters that you want to use.

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So if you want to play around with this a little bit then pause the video and give this a go see what

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you can pull out.

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Otherwise let's delete this line here and let's actually create our directory.

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So the way we're gonna do this is with our OS module operating system OS dot path.

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Don't join.

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We'll create our folder path for us.

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So what are we going to join.

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We're going to join our root directory our log underscored directory from upstairs in the constant section

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alongside with our folder name.

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So this will create a path for us.

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And with this path we can actually make a directory including a sub directory so setting up two folders

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in a row the way we're gonna do this is with OS.

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Don't make D.

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IRS make directories and this will need a path.

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In other words this value should actually go between these parentheses.

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So you can see that the paths are quite important.

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So let's give them their own variable to make this code a lot easier and less nested Diaw are underscore

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paths and we'll put that in here.

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Are on a score paths.

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Now what I'll do is I'll make this window slightly smaller and bring up my project folder here on the

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side so you can see what happens as I execute this cell.

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Did you spot it.

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Here's my tensor board on a score CFR underscore logs folder and then inside this folder.

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Got a sub folder called model on a score one at seventeen twelve brilliant right.

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Let's see what happens when I execute the cell again in this case.

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I've got an error my code just failed.

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If I scroll down I can see why.

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Error number seventeen file exists.

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Python did not like executing this cell again when the folder already existed.

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So if I delete this folder it should work in theory right.

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So I deleted it.

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Hit shift enter and I get my folder being created in my cell executing without an error.

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So how can we make this a little bit more failsafe.

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How can we add some code here to handle these errors if there are any.

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The python pattern that we're gonna adopt here is the try block.

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So if you write try semicolon and then tab this line of code over so that it is nested inside this try

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statement here.

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Then python will try to execute this code and if it gets an error then it gives us a chance to handle

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the error.

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So let's do just that on the next line.

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Use the keyword except and the except keyword will be followed by the kind of error that we're gonna

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get we're gonna get an OS error.

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So that's capital O capital S capital E and then we're going to try and print this era.

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So first what it will do is we'll store this error as a variable called E R R and then I'll Addy semicolon

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here at the end and then in the next line nested inside except I'll print e r r r dot s t r error.

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This will convert our error to a string and allow us to print it out.

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The very last thing I want to do is I want to write a success message.

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If everything worked splendidly so I'll add an else clause here.

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This is gonna be at the same level as our try and our except block and all it's gonna do is print out

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the message successfully created the rectory.

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So what are we doing here.

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Well we're going to try to create these folders if we have an error.

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We're going to print out the error below the cell and otherwise we're gonna print out success.

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That's all we're gonna do.

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So let's try this out.

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Let's see what happens when I execute the cell create the directory and then execute the cell again.

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In this case all that happens is we handle the error and the error rates of file exists.

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So no directories are created and there's nothing else we have to do.

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Brilliant.

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Let me quickly go to you and toggle my head so that I've got a little bit more screen real estate.

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Now all we've done so far is talk to her operating system and create some folders.

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We actually haven't set up tents aboard yet tense aboard.

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It's actually very very simple to setup a hall we need to do is call tense aboard open parentheses and

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then inside these parentheses supply the log directory so we need to point ten support to the folder

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where those logs are going to live.

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So log underscored the IRR is equal to this value right here.

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This is where we've created our folders right.

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So Diaw on a score path's is the argument that we're going to feed into this call to tend avoid how.

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This is very well and good but we actually probably want to create a new folder every time we train

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the model because we're training it made with a slight variation or we're trading one or two or three

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or four.

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So this ideally should be a function and we know of course how to create functions.

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We do that with the DFT would we'll call this function get tense a board and we're gonna supply only

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one parameter here and it's going to be the model on discordant names so that way we can vary up the

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folder name depending on what input this function gets.

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So if I had some curly braces here and change this to model on a screen name then the folder name will

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be whatever it is that we've supplied to this function and we can take all of this code.

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Now tab it over.

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So it all moves and it's inside the body of the function and then we will return the 10 support object.

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This is all the work that we need to do to get tense board up and running to actually see tensor board

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in action will need to train our model though and we're gonna do just that in the next lesson.

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I'll see you there.