Displaying an image using PyOt5 in Python

This tutorial will focus on how to use PyQt5 to load and display an image in a window. We’ll also cover the necessary steps from setting up the application to dynamically rendering images, ensuring that the process is straightforward and adaptable for various use cases.

Step 1: Install PyQt5

Before we use PyQt5 to display an image , install it by running:

pip install PyQt5

Step 2: Import Required Classes

The specific PyQt5 modules are:

• QApplication to manage the application.
• QMainWindow to create the main window.
• QLabel to display the image.
• QPixmap to handle image loading and rendering.

Step 3: Create the Main Window

We have to define a class to represent the application window. This class will inherit from QMainWindow and include logic to load and display an image.

Step 4: Set Up the Window Layout

In the __init__ method of your window class:

1. Setting the title using setWindowTitle().
2. Defining the size and position of the window using setGeometry().

Step 5: Add a QLabel Widget

We need to create a QLabel to act as a container for the image. Also set its position and dimensions using setGeometry()..

Step 6: Load the Image

Then use QPixmap to load your image file. Most importantly make sure to replace "path_to_your_image.jpg" with the file path of the image you want to display.

Step 7: Display the Image

Then we set the loaded image to the QLabel using the setPixmap() method.

Step 8: Scale the Image (Optional)

If we want the image to adjust to the size of the label, enable the scaling with the setScaledContents(True) method.

Step 9: Launch the Application

Lastly, create a QApplication object to initialize the app . Instantiate the main window class, display the window with show(),, and start the application’s event loop with exec_().

Full Code Example:

import sys
from PyQt5.QtWidgets import QApplication, QLabel, QMainWindow
from PyQt5.QtGui import QPixmap

class ImageDisplayWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        # Set up the window
        self.setWindowTitle("Image Viewer")
        self.setGeometry(100, 100, 800, 600)

        # Add a label to display the image
        self.image_label = QLabel(self)
        self.image_label.setGeometry(50, 50, 700, 500)

        # Load and display the image
        image = QPixmap("path_to_your_image.jpg")  # Replace with your image path
        self.image_label.setPixmap(image)
        self.image_label.setScaledContents(True)  # Scale image to fit the label

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = ImageDisplayWindow()
    window.show()
    sys.exit(app.exec_())