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Good what you're seeing here is this creed that we created in the last lecture.

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All of this creates a window with a borough's bother and generate came about them which for now do nothing.

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But the thing here is that every time we exit this group creepy your window is created.

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But also we are creating a point to not the fall because these lines are being executed to what we want

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instead to actually execute these lines when we press generate camel bottom.

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So the first thing we have to do here is to actually wrap these lines inside of function.

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So let's say def K.M. function and here we have to pass two parameters either in file parameter and

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an old file parameter we can put some default values to these two parameters.

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So the first would be the input file and the second is the food file.

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Great.

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And of course this parameter needs to reflect the input for the receivers the fall and for the safe

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method.

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We have an error or even a valid syntax Yes we have and added the column I know to indent all these

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lines easily.

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You just go ahead to edit and indent.

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So we have four function.

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Now if I delete this file and exit the script we are just calling.

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We do.

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So the file is not generated.

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So instead we want to call this function when the generator can no bottom be suppressed for that we

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need to add a command parameter that will be equal to the name of the function that we want to execute.

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That's it.

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Now execute the script and say general.

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And we have the points for all gyrated

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And here to the points.

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Let's close this now.

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So that's how to have an action to generate Kimbell bottom.

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What we also want to do is append function to the borough Bhavan as well.

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So that was when the borough's bothered News-Press.

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They use there will be performed with a dialog window asking the user to specify those C as the file

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that they want to process to create such a dialog.

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We know you have to import the as open filename method from Khidir again.

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So from Tkinter that file dialogue import ask open file name so a file named method is part of all the

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file dialog.

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Class of the library.

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But before we use ask open file no method I would like you to see what this actually does.

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So I'm going to go ahead and or all of this line in the Python console.

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And then I create a variable and assigned to the variable.

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Then ask open file name execute.

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So we have the dialog we do.

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Now if we select a file here and say open.

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Seemingly not.

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Nothing happened but if we print out the file path variable we will get the path of the file that we

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selected.

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So with the scope of file name is doing that is juried in a string of all the files that we are specifying

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either do we window.

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So now we have to make use of that and pass that string to all Kimmo function.

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So let's go and do just that.

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And what we want to do now is to actually spend the over file name method to the Barrow's bottom that

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we have created and for that we again have to create a function.

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So let's say you've def Burrowes.

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And here we say infile equals ask open filename.

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Then we want the Broz bottom returns evolved path string.

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No we assign the borough's function to the command parameter let's execute the screaming out to see

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what's going on but I'll delete the camera for the first and execute.

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And so we have two buttons.

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So let's test the browes bottom.

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Gud looks good.

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Let me specify the file I want to convert to K.M. great and then press generate bottom and we get the

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points.

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Can fall no Everything looks beautiful but it's actually not as beautiful as it looks like it to through

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that one.

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Prezza generate came the bottom came a function is triggered.

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However if you look closely here you'll see that the Kim of function is getting the file impute from

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the string.

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But this is not what you wanted.

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What we wanted was that came a function gets a string out of a Berle's function.

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So the Berle's function is the function that generates the file path string.

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So what we want to change here is that we want to call the Burleigh's function inside the camera function

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this way very turned in fall value will be passed to the infile of peril matter here.

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Good.

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Well let's execute this now.

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Mm hmm.

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So he got an open dialog window but we didn't want it to get the dialog window immediately.

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We wanted to get it after we bought him.

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So why is this happening.

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The reason is that we're from exec you just create it from the first line and all the lines one by one

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down to the bottom.

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And when it goes to the functions it freezes the definition of the functions of a ghost of a claim of

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function and what it does here is that it exec used the browse function.

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So before we triggering the action by pressing the browser button pythoness executing the browse function

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before we pressed Broz bottom.

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So we need a way that allows us to grab the infile pass in from the Berle's function but doesn't exec

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you the Berle's function.

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So the thing that does the trick here is the global variables.

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So as I already told you a lecture about the global variables we use a global variable when we don't

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want to execute the function.

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So we just want to fetch some information on the side of that function.

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In such case we don't need the return file here but we just want to make the infile variable obal valuable.

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And of course we have to remove the argument here.

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So what happens now is that when the script is executed so it reads the definition of the browse function

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it reads the definition of a function and it doesn't call any function we need to reach to this definition.

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But before we had the brawls function been called a camel function.

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So let's take this now and I'll delete the points not the camel file or on we get.

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We know very nicely.

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I'll go to my computer which for some reason I have renamed to 7 year old who of course you know it's

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quick generate and we have a point Scammell file generated areas or African savannah growth so this

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is how you create a graphical interface and assign functions to them so that they actually do something.

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I'll see you in the next lecture.