A QPixmap can be used to show an image in a PyQT window. QPixmap() can load an image, as parameter it has the filename. To show the image, add the QPixmap to a QLabel.
QPixmap supports all the major image formats: BMP,GIF,JPG,JPEG,PNG,PBM,PGM,PPM,XBM and XPM.
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PyQT image
QPixmap
Start by creating a QPixmap and a QLabel. Then you can combine them like this:
self.im = QPixmap("./image.jpg")
self.label = QLabel()
self.label.setPixmap(self.im)
Then add the whole thing to a layout, like a QGridLayout
self.grid = QGridLayout()
self.grid.addWidget(self.label,1,1)
self.setLayout(self.grid)

Example
Copy and paste the code below to load an image from your local computer. The image will be shown in a grid layout.
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QGridLayout, QWidget
from PyQt5.QtGui import QPixmap
class Example(QWidget):
def __init__(self):
super().__init__()
self.im = QPixmap("./image.jpg")
self.label = QLabel()
self.label.setPixmap(self.im)
self.grid = QGridLayout()
self.grid.addWidget(self.label,1,1)
self.setLayout(self.grid)
self.setGeometry(50,50,320,200)
self.setWindowTitle("PyQT show image")
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
Practice now: Test your Python skills with interactive challenges
Practice now: Test your Python skills with interactive challenges