PyQt5 – What’s this help text for Label | setWhatsThis() method

In PyQt5, there are lots of widgets and while making an application we end up putting lots of widget. Sometimes, we can remember why this widget is used but not always, neither it seems a good practice. That’s why for back-end purposes, PyQt5 allows us to set help text. In this article, we will see how to set and access help text for label.

To set help text we use setWhatsThis method –

Syntax : label.setWhatsThis(help_text)
Argument : It takes string as argument.
Action performed : This set the help text.

To access help text we use whatsThis() method –

Syntax : label.whatsThis()
Argument : It takes no argument.
Return : Returns a string.



Code :

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# importing the required libraries
  
from PyQt5.QtCore import * 
from PyQt5.QtGui import * 
from PyQt5.QtWidgets import * 
import sys
  
  
class Window(QMainWindow):
  
  
    def __init__(self):
        super().__init__()
  
  
        # set the title
        self.setWindowTitle("Python")
  
        # setting  the geometry of window
        self.setGeometry(60, 60, 600, 400)
  
        # creating a label widget
        self.label_1 = QLabel("Label ", self)
        # moving position
        self.label_1.move(100, 100)
  
        # setting up the border
        self.label_1.setStyleSheet("border :3px solid blue;")
  
        help_text = "this is a label"
  
        # setting the information for a label
        self.label_1.setWhatsThis(help_text)
  
        # accessing the information
        whats_this = self.label_1.whatsThis()
  
        # creating a label widget to display whatsthis
        self.label_2 = QLabel(whats_this, self)
  
        # moving the label
        self.label_2.move(100, 130)
  
  
        # show all the widgets
        self.show()
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())

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Output :

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

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