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In this video, we will build together

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the script that solves the exercise, the current exercise.

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So this script is going to scrape a value from this web page, this particular value every two seconds

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because this value is changing every two seconds.

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So we're going to get that value and store each value in a text file.

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So let's see how we can do that.

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This function gets the driver for the homepage, right?

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And we get that driver in here.

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We sleep for two seconds and then we get that element.

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So what we need to change here, I think, is that we need to give these elements multiple times.

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Therefore, it makes sense to put that element inside a loop, this scraping here.

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So I'm going to select that and also time the Sleep Press tab to indent them.

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And then while true, run these every two seconds.

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So the loop will first wait two seconds after we load the page, so we load the page.

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The loop starts immediately.

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It waits two seconds and then it gets the element, in here.

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So what do we want to do with the element?

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Well, let's start by extracting the texts, so I'm going to delete this return statement.

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So, we want to extract the text, which is equal to that, and delete return.

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We will probably not need to return any value here since we are not printing out things in the terminal,

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but we are writing things in a file that means our function will not contain any return value.

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So once we get the text, we want to write that text to a file.

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So should we do with here or does it make more sense to create a function that is responsible for creating

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files such as define write_file, which gets texts just a parameter as input, and then let's

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you write a doc string for this?

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Such as "Write input text into a text file" with double quotes, and so let's define what file name

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will this text contain

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before we do with open file name, 'w'

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as file file.write.

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Something here, which is the text, the content, so text will be written inside the file with this

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file name.

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So the file name is important here because we don't want to have duplicate file names. To avoid having

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duplicate file names,

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we need to use something like a date time that changes every two seconds that will make our date times

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unique.

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So file name would be equal to.

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And f string.

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So which is going to be something like .txt?

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And here we have a placeholder, which will be the dt.now.

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So date time.

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What is dt?

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Well, dt is something we need to import from datetime, a standard Python library import datetime

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as the dt so dt will be the variable equivalent to this datetime.

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The object that returns datetime instances.

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So dt.now gives us the current datetime, as you may know.

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So just if I copy that, paste it here and say dt.now gives us that.

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And from that, if we apply str f time, which stands for string from time, so we want to generate

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a string out of that datetime object.

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This is a datetime object, right?

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We need a string because you use that string as a file name.

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So this file name here that we provide to the open function is expected to be a string, so text.

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Therefore, we need to convert D.T. now to text because currently the type of data that now is a date

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time, class type.

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So again, dt.now().strftime and inside here you want to provide some data time flags or

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directives or format code or whatever we would like to call them.

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You can find these easily on the web if you search for datetime format.

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Python.

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So we want to extract basically, we said the year.

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So we say y. If we execute this...

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Sorry, it's a capital Y.

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If you execute that's you get the current year.

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Now, if you add a dash, you get the current year and the dash.

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If you add after the dash, a small m, you get the current year and the number of the month and so

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on, keep adding things like that and you will construct the date time as a string.

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So next would be the day, right?

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And then maybe have a dot and then have the hour, the minutes with capital M Dash and seconds with capital

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S.

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Yeah, that's it.

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And we get this string.

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So any time I execute this, we're going to get the string different from the first one.

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So four seconds later, right?

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Six.

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Two seconds later and so on.

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Right.

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I'm going to copy that expression and paste it inside these curly brackets entirely.

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So that's string dot txt constructs the file name, and then we create a file with that file name in

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write mode.

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The file object is stored in this variable and in that file object we write the text.

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So now what we want to do is we want to get the text here and clean it, and this will give us a float.

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Remember it's a float.

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Therefore, I will convert this into a string so that we can provide that text to write file, so write

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file text.

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So this variable goes here, now you could say, why 

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don't you just delete this float and it will be a string anyway, so you don't have to convert first

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to a float and then you convert it back to a string?

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But I wouldn't prefer that method.

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I would like to leave this function independent, so I don't want to create coupling between the functions.

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The role of this function is to clean the text and to give that value as a number as flow.

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So don't mess with that function, just convert it into a string.

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No problem.

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It doesn't take any resources

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practically. This looks good to me, so I'll give it a try.

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So run.

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This is lagging.

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So I will try to reload, and run again, it sometimes happens to repl.

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But you will not lose any changes that you made to your script.

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So run again.

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And we have a syntax error here.

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So as you see, repl is also underlining this because we have double quotes inside double quotes.

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The outer double quotes is this and that one.

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And this should be single quotes here.

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Single quotes in here, run again.

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The browser is starting.

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And here is our first text file, so second 32, 

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34, 36, 38.

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Let's open them.

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34.

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25.0.

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The current world temperature, the fake temperature.

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28 and so on and so forth.

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Yep, it's working well like that.

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Sometimes, though, you will have some delays.

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For example, from 50, it jumped up to 53.

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There will be a mismatch between seconds, but I wouldn't worry about that.

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Still, we have one file generated every two seconds, so.

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That's how you do it.

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Thanks a lot, and I'll talk to you in the next videos.