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

Last Updated : 26 Mar, 2020

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 :

# 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()) 