Python Template Example

• Python Template File Example

Tkinter package is a very powerful package. If you already have installed Python, you may use IDLE which is the integrated IDE that is shipped with Python, this IDE is written using Tkinter. Sounds Cool!!We will use Python 3.6, so if you are using Python 2.x, it’s strongly recommended to switch to Python 3.x unless you know the language changes so you can adjust the code to run without errors.I assume that you have a little background about to help you understand what we are doing.We will start by creating a window then we will learn how to add widgets such as buttons, combo boxes, etc, then we will play with their properties, so let’s get started.

Mainloop ( )And this is the result:Without calling the grid function for the label, it won’t show up. Set label font sizeYou can set the label font so you can make it bigger and maybe bold. You can also change the font style.To do so, you can pass the font parameter like this:lbl = Label ( window, text = 'Hello', font = ( 'Arial Bold', 50 ) )Note that the font parameter can be passed to any widget to change its font not labels only.Great, but the window is so small, we can even see the title, what about setting the window size? Setting window sizeWe can set the default window size using geometry function like this:window. Geometry ( '350x200' )The above line sets the window width to 350 pixels and the height to 200 pixels.Let’s try adding more GUI widgets like buttons and see how to handle button click event.Adding a button widgetLet’s start by adding the button to the window, the button is created and added to the window the same as the label. Mainloop ( )The result looks like this:Note that we place the button on the second column of the window which is 1.

If you forget and place the button on the same column which is 0, it will show the button only, since the button will be on the top of the label. Change button foreground and background colorsYou can change foreground for a button or any other widget using fg property.Also, you can change the background color for any widget using bg property.btn = Button ( window, text = 'Click Me', bg = 'orange', fg = 'red' )Now, if you tried to click on the button, nothing happens because the click event of the button isn’t written yet. Handle button click eventFirst, we will write the function that we need to execute when the button is clicked. Mainloop ( )Run the above code and check the result:Awesome!!Every time we run the code, we need to click on the entry widget to set focus to write the text, what about setting the focus automatically?

Set focus to entry widgetThat’s super easy, all we need to do is to call focus function like this:txt. Focus ( )And when you run your code, you will notice that the entry widget has the focus so you can write your text right away.

Disable entry widgetTo disable entry widget, you can set the state property to disabled:txt = Entry ( window, width = 10, state = 'disabled' )Now, you won’t be able to enter any text. Mainloop ( )As you can see, we add the combobox items using the tuple.To set the selected item, you can pass the index of the desired item to the current function.To get the select item, you can use the get function like this:combo. Get ( )Add a Checkbutton widget (Tkinter checkbox)To create a checkbutton widget, you can use Checkbutton class like this:chk = Checkbutton ( window, text = 'Choose' )Also, you can set the checked state by passing the check value to the Checkbutton like this.

From tkinter import.from tkinter.ttk import.window = Tkwindow.title('Welcome to LikeGeeks app')selected = IntVarrad1 = Radiobutton(window,text='First', value=1, variable=selected)rad2 = Radiobutton(window,text='Second', value=2, variable=selected)rad3 = Radiobutton(window,text='Third', value=3, variable=selected)def clicked:print(selected.get)btn = Button(window, text='Click Me', command=clicked)rad1.grid(column=0, row=0)rad2.grid(column=1, row=0)rad3.grid(column=2, row=0)btn.grid(column=3, row=0)window.mainloop. Res = messagebox. Askretrycancel ( 'Message title', 'Message content' )You can choose the appropriate message style according to your needs.

File = filedialog. Askopenfilename ( )After you choose a file and click open, the file variable will hold that file path.Also, you can ask for multiple files like this:files = filedialog. Askopenfilenames ( ) Specify file types (filter file extensions)You can specify the file types for a file dialog using filetypes parameter, just specify the extensions in tuples.file = filedialog. Askopenfilename ( filetypes = ( ( 'Text files', '.txt' ), ( 'all files', '.'

) ) )You can ask for a directory using askdirectory method:dir = filedialog. Askdirectory ( )You can specify the initial directory for the file dialog by specifying the initialdir like this. Mainloop ( )Here we add another menu item called Edit with a menu separator.You may notice a dashed line at the beginning, well, if you click that line, it will show the menu items in a small separate window.You can disable this feature by disabling the tearoff feature like this:newitem = Menu ( menu, tearoff = 0 )Just replace the newitem in the above example with this one and it won’t show the dashed line anymore.I don’t need to remind you that you can type any code that works when the user clicks on any menu item by specifying the command property.newitem. Addcommand ( label = 'New', command = clicked )Add a Notebook widget (tab control)To create a tab control, there are 3 steps to do so.

First, we create a tab control using Notebook class. Create a tab using Frame class. Add that tab to the tab control. Pack the tab control so it becomes visible in the window. Mainloop ( )Add spacing for widgets (padding)You can add padding for your controls to make it looks well organized using padx and pady properties.Just pass padx and pady to any widget and give them a value.lbl1 = Label ( tab1, text = 'label1', padx = 5, pady = 5 )Just that simple!!In this tutorial, we saw many Python GUI examples using Tkinter library and we saw how easy it’s to develop graphical interfaces using it.This tutorial covers main aspects of Python GUI development not all of them.

There is no tutorial or a book can cover everything.I hope you find these examples useful. Keep coming back.Thank you. Hello, nice tutorial!I just went through it, and well, pretty much mixed all the bits in one window!So a problem showed up when wanting to use the Notebook widget, and it’s that I had a label at the very top acting as a “title” (the very first example you show), and wanted to add the tabs underneath the title, and it wouldn’t let me, it seems like the moment you use Notebook you need to put things inside ( tkinter.TclError: cannot use geometry manager grid inside. Which already has slaves managed by pack).Something else that I tried is, animate the Progressbar with a for steps in range(100) and changing the value in every step after sleeping for like 0.5 sec, but that didn’t work either, it just “counted” and then filled it all in one go.

Also I though of adding a progress bar in a messagebox, as in “Processing” and when it finishes loading, close the message box, but a quick query proved that to be trickier than I though.Well, thanks for the effort, and now I just gotta keep diggin! From tkinter import.from tkinter import ttkwindow = Tkwindow.title('Welcome to LikeGeeks app')# Label that act as a 'Title' something like an H1lbl = Label(window, text='Hello', font=('Arial Bold', 50))lbl.grid(column=0, row=0)# Tabstabcontrol = ttk.Notebook(window)tab1 = ttk.Frame(tabcontrol)tab2 = ttk.Frame(tabcontrol)tabcontrol.add(tab1, text='First')tabcontrol.add(tab2, text='Second')lbl1 = Label(tab1, text= 'label1')lbl1.grid(column=0, row=2)lbl2 = Label(tab2, text= 'label2')lbl2.grid(column=0, row=2)tabcontrol.pack(expand=1, fill='both')window.mainloop. Save a.py in the same folder as a python script using tkinter that you know works called “tkinter” and try and run your python script that works. I guarantee it wont run because when you try to import it will use the tkinter.py that you made and obviously not contain the necessary code. It was an error I was having earlier this week and I’ve just retested and I am certain that is the problem.

It may or may not be this person’s problem but it definitely breaks tkinter code if you name a file tkinter.py. Thank you for your help.I have another question for a strange radio behavior.For “Need Specific Number?” (radio 1 and radio 2) and “Want to Send email with different email address?”(radio 5 and radio 6), I can only select 1 of them. For example, if I select radio 1, then select radio 5 or radio 6, radio 1 is de-selected.

Python Template File Example

Hi sir,Please help me!! Nicely written tutorial.I am working on Raspberry Pi and found that Setting window size did not work. I tried: window.geometery(‘800×600’)for example with no change in size.Anyone else have problem?My full code:#From:from tkinter import.window = Tkwindow.title(“Welcome to LikeGeeks app”)#lbl = Label(window, text= “Hello there my little friend.”, font=(“Arial Bold”,50))lbl = Label(window, text= “Hello”, font=(“Arial Bold”,50))lbl.grid(column=0, row=0)window.geometery(‘800×600’)#Start up our GUIwindow.mainloop. Hello,I have a problem with buttons when I try to add background / foreground.When I added “from tkinter.ttk import.” to the earlier file where we set background and foreground button colors the buttons disappear from the GUI and I get error. This code works perfectly.from tkinter import.class Window (Frame):def init(self, master = None):Frame.init(self,master)self.master = masterself.initwindowdef initwindow(self):self.master.title('Please send help thanks.' )self.pack(fill=BOTH, expand=1)menu = Menu(self.master)self.master.config(menu=menu)file = Menu(menu, tearoff=0)file.addcommand(label='Open')file.addcommand(label='Exit', command=self.clientexit)menu.addcascade(label='File', menu=file)edit = Menu(menu, tearoff=0)edit.addcommand(label='Show Text', command=self.showTxt)menu.addcascade(label='Edit', menu=edit)help = Menu(menu, tearoff=0)help.addcommand(label='Help Index')help.addcommand(label='About Us')menu.addcascade(label='Help', menu=help)def showTxt(self):text = Label(self, text='Good morning sir!'

)text.packdef clientexit(self):exitroot = Tkroot.geometry('400x300')app = Window(root)root.mainloop.

.But a pet peeve of mine is copying and pasting. If you’re moving data from its source to a standardized template, you shouldn’t be copying and pasting either.

It’s error-prone, and honestly, it’s not a good use of your time.So for any piece of information I send out regularly which follows a common pattern, I tend to find some way to automate at least a chunk of it. Maybe that involves creating a few formulas in a spreadsheet, a quick shell script, or some other solution to autofill a template with information pulled from an outside source.But lately, I’ve been exploring Python templating to do much of the work of creating reports and graphs from other datasets.Python templating engines are hugely powerful. My use case of simplifying report creation only scratches the surface of what they can be put to work for. Many developers are making use of these tools to build full-fledged web applications and content management systems. But you don’t have to have a grand vision of a complicated web app to make use of Python templating tools. Why templating?Each templating tool is a little different, and you should read the documentation to understand the exact usage.

But let’s create a hypothetical example. Let’s say I’d like to create a short page listing all of the Python topics I've written about recently. Something like this. My Python articles These are some of the things I have written about Python: Python GUIs Python IDEs Python web scrapers Simple enough to maintain when it’s just these three items. But what happens when I want to add a fourth, or fifth, or sixty-seventh? Rather than hand-coding this page, could I generate it from a CSV or other data file containing a list of all of my pages? Could I easily create duplicates of this for every topic I've written on?

Could I programmatically change the text or title or heading on each one of those pages? That's where a templating engine can come into play.There are many different options to choose from, and today I'll share with you three, in no particular order:,. Makois a Python templating tool released under the MIT license that is designed for fast performance (not unlike Jinja2). Mako has been used by Reddit to power their web pages, as well as being the default templating language for web frameworks like Pyramid and Pylons.

It's also fairly simple and straightforward to use; you can design templates with just a couple of lines of code. Supporting both Python 2.x and 3.x, it's a powerful and feature-rich tool with, which I consider a must.

Features include filters, inheritance, callable blocks, and a built-in caching system, which could be import for large or complex web projects. Jinja2Jinja2 is another speedy and full-featured option, available for both Python 2.x and 3.x under a BSD license. Jinja2 has a lot of overlap from a feature perspective with Mako, so for a newcomer, your choice between the two may come down to which formatting style you prefer.

Jinja2 also compiles your templates to bytecode, and has features like HTML escaping, sandboxing, template inheritance, and the ability to sandbox portions of templates. Its users include Mozilla, SourceForge, NPR, Instagram, and others, and also features.

Unlike Mako, which uses Python inline for logic inside your templates, Jinja2 uses its own syntax. Genshiis the third option I'll mention. It's really an XML tool which has a strong templating component, so if the data you are working with is already in XML format, or you need to work with formatting beyond a web page, Genshi might be a good solution for you.

HTML is basically a type of XML (well, not precisely, but that's beyond the scope of this article and a bit pedantic), so formatting them is quite similar. Since a lot of the data I work with commonly is in one flavor of XML or another, I appreciated working with a tool I could use for multiple things.The release version currently only supports Python 2.x, although Python 3 support exists in trunk, I would caution you that it does not appear to be receiving active development. Genshi is made available under a BSD license. ExampleSo in our hypothetical example above, rather than update the HTML file every time I write about a new topic, I can update it programmatically. I can create a template, which might look like this. Template import Templatemytemplate = Template (filename = 'template.txt' )print (mytemplate.

Render (topics = ( 'Python GUIs', 'Python IDEs', 'Python web scrapers' ) ) )Of course, in a real-world usage, rather than listing the contents manually in a variable, I would likely pull them from an outside data source, like a database or an API.These are not the only Python templating engines out there. If you’re starting down the path of creating a new project which will make heavy use of templates, you’ll want to consider more than just these three. Check out this much more comprehensive list on the for more projects that are worth considering. For more discussion on open source and the role of the CIO in the enterprise, join us at.The opinions expressed on this website are those of each author, not of the author's employer or of Red Hat.Opensource.com aspires to publish all content under a but may not be able to do so in all cases. You are responsible for ensuring that you have the necessary permission to reuse any work on this site. Red Hat and the Red Hat logo are trademarks of Red Hat, Inc., registered in the United States and other countries.Copyright ©2019 Red Hat, Inc.