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Build a Calculator With PyQT5 Designer - PyQt5 GUI Thursdays #8
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- Опубліковано 18 сер 2024
- In this video we'll start to build a basic calculator app with PyQT5 Designer and Python.
We'll start out by roughing in our GUI in the PyQT5 Designer. Once we get it looking the way we want to look, we'll convert that .ui file into a Python file and start to write code for button functionality.
Timecodes
0:00 - Introduction
1:25 - Add A Label To Our Calculator App
5:07 - Create Calculator Buttons
7:43 - Change The Text Of Each Button
9:02 - Change The Name Of Each Button
11:00 - Convert UI File To Python File
12:16 - Create Press_It() Function For Pressing Buttons
13:06 - Update Button Code To Call Press_It()
17:42 - Update Press_It Functionality
19:24 - Remove 0 On Button Click
20:13 - Conclusion
#codemy
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I was just looking at the documentation for PYQT5 when I came across your video tutorials! And I can confidently say you are one of the BEST instructors I've seen on YT for python and GUI's. Keep up the good work, and greetings from Canada!
Wow thanks, I appreciate that!
Your code is clear and very easy to understand
Thanks!
Thank god you are making videos about PyQT5 I was using just right now! Your videos are awesome thx!
Glad you like them!
thank you so much! you've helped me with my college homework:D
Happy to hear it!
I think it would be fair to put a remark, that it's not the best way to code anything more complex than such a dummy calculator, to let people know about patterns like MVC or MVVM which let decouple the GUI part (view) from the logic (model), so that if you want to remove a button or even implement simplified UI for the mobile device version, you don't need to reconstruct the logic down there (and vice versa). And also would be good to mention layouts rather than manually aligning pixels (imagine you decide to resize the main window by 10% just after you've precisely set positions to all the buttons). It's nice intro to how QT designer works, but otherwise this is the way GUI apps were written 20+ years ago ;)
How can I learn about MVC and MVVM?
very nice and simple explanation
THANKS TEACHER :D
Welcome!
Great series! Keep up the good work and greetings from Montreal!
Thanks!
Great tutorial! Thanks John.
Very Welcome
Just one comment is that you could double click the text to edit it on the pushButton. Thanks for the amazing tutorial videos.
on the if "0" shouldnt that be in the if statement to prevent unneccesary nesting? as if "0" the output label == pressed?
So im curious if you're doing it because of visibility or not as its more or less same amount of code.
Great Sir. Thank you
Welcome!
Thank you for this tutorial. I am now using the designer to build better GUIs. Tkinter was a bit frustrating for me.
Glad it helped!
thank you very much!
Glad to hear it!
Hi, many thanks for the excellent hands-on tutorial! Btw is there a code snippet of keeping the QPT5 Window always infocus or bring it back infocus automatically in the Windows OS? [I'm making an app with PyQT5 and need this feature]
Thank you so muchhhhh
Welcome
Thx for the video!
Why did you modify ANY code in the Calc.py file? Any subsequent changes in the .UI file in designer will blow away all your code changes? I "thought" the process was to create your form in designer. Use the .UI file to create the .py file of class data. Then import that into say your "main.py" file where you then create a class and then all your "custom" code goes into your main?
Or... Is there a way using the Designer, to use its "Signal/Slot Editor" or "Action Editor" to establish your button click code so if you come back into he designer later to update the form say to add a forgotten button, you can then regen the .py file from the .ui file without losing all anything?
Because this is an ongoing series that teaches new things.... lol chill out and keep watching...
Great videos, question, how do you manage changes? if you later added a new feature to your calculator but also altered the .py file a lot already, is there a way to properly managed this changes?
Yeah I'll need to do a video on this one of these days
Traceback (most recent call last):
File "C:\Users\sreem\OneDrive\Documents\PYQT\calc.py", line 12, in
self.fourbutton = QtWidgets.QPushButton(self.centralwidget, clicked= lambda: self.press_it("4"))
File "C:\Users\sreem\OneDrive\Documents\PYQT\calc.py", line 219, in press_it
self.label.setText(f'{self.label.setText.text()}{pressed}')
AttributeError: 'builtin_function_or_method' object has no attribute 'text'
this came after 18:53
I have a question about kivymd
please ans
Question : In kivymd textfield how can i check if left-icon clicked
This isn't a Kivy video
@@Codemycom But can't i ask the question 😰😰
@@MEHEDIHASAN-kx6ok Not under a PyQT video
@@Codemycom huh i have asked in kivy video
Hi
I have a problem with QCalendarWidget
I am creating a To-Do List with Persian Calendar(Jalali)
but I can't change Change The Calendar to Jalali
I Change the language and country but I can't figure out how to change the calendar itself!!
Videos are so early nowadays...👏👏
yep
energetic as always
very good and thank you
I tried so hard to make a percentage
But I finally figured it out : -- )
:-)
Hello John, thanks for the tutorial videos, I have a problem here when I run my code the vs code gives me this error: " Ui_MainWindow.press_it() missing 1 required positional argument: 'pressed' "
You forgot to pass an argument to the function in the button code. 13:09
@@Codemycom Yeah :), I should have passed each button names to the function so I solved it quickly.
Sample Code for fiveButton:
clicked = lambda : self.press_it(pressed ="5")
Can you make a video how to print documents/pdfs with PyQt's QPrinter? Would be very cool and very useful. Thanks a lot before!
Might look into that :-)
Thanks Sir :)
Most welcome
hello sir, what is the command for mac to convert a .ui file to .py file
the windows command doesn't work here
It works nicely!
why when I change the ui file to py and I open it in vscode it open with html code no python
no clue, I wouldn't use vscode.
can we do it with normal pyqt5(with no pyqt designer)
Sure, if you want. But I wouldn't.
Need help when i run my python file it just opens and closes immediately any fix
What did you do differently from the video?
Can't we have Designer for tkinter
:-p
@@Codemycom I don't understand what you replied
@@codeKeshav the answer is no
@@Codemycom ok sir
I really love the content of your video presentations. However, when I look at the designer tool on this video, it appears a bit out of focus. I'm viewing on a Mac with excellent retina display resolution.
Click the gear in the bottom corner of the video, change the Quality resolution to the highest available (HD). Your resolution likely got knocked out of wack somehow.
@@Codemycom Thank you! Worked like a charm! Cold day here in Vegas! Good day for coding!
@@briangreenberg153 I hear that! What happened to those 70 degree days we had just a few days ago?!
@@Codemycom Today even worse! Got some light precipitation this morning here on the west side. Any chance you could increase the frequency of the PyQt5 GUI videos to more often than just Thursdays?
@@briangreenberg153 Yeah it rained here off and on all day near Lone Mountain. No sorry, my current production schedule is pretty set..
Just for a joke :
I was doing a coding project
When I got an error.
My guardian angel came and told me you have done something wrong please check line number 5 . Please check and correct it. I thanked my angel. And my angel warned me don't repeat it.
one comment for yt algorithm
Thanks!
UA-cam1
ha yep