Python Tutorial

We will learn how to add and use a table in our PyQt5 application in this tutorial. A table is a row-and-column data layout that is often used in data analysis, research, and communication. QTableWidget allows us to add one or more tables to our PyQt application.

We will use the example of wanting to display the name and city of several persons in a table in our application to further illustrate the concept. From a database, JSON file, or any other type of storage system, we may extract the data.

Before beginning the project, a few fundamental PyQt5 requirements :

The most efficient way to manage dependencies in Python is by utilising a virtual environment. A virtual environment is, to put it simply, a local directory that contains the libraries required for a certain project. A system-wide installation of those libraries, on the other hand, would affect all of your projects.

One instance of QApplication must be present in every GUI programme; this is a Qt requirement. Several Qt components cannot be used until the import line has been executed. It will thus be necessary in practically every PyQt programme you write.

Buttons, labels, windows, conversation boxes, progress bars, and other widgets are all instances of PyQt apps. Like HTML components, widgets are often nested. A window, which may also have a label, may contain a button, for example.

One of the benefits of Qt is its support for custom styles. There are several ways you may change the way your application looks and feels.

Along with the aforementioned, style sheets let you change how your application looks. This is Qt's rendition of CSS.

Walking through the code :

import sys
from PyQt5.QtWidgets import *

First of all, we will import all the required files into our program from the standard python library. These files include sys and QtWidgets.

#Main Window
class App(QWidget):
    def __init__(self):
        super().__init__()
        # Setting the title
        self.title = 'PyQt5 Table - Python'
        # Setting the Position
        self.left = 0
        self.top = 0
        self.width = 400
        self.height = 250

        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)

Then, we will create a new class for our program. In that we will set the title for the window and set the geometry for the same.

        # introducing a table
        self.creatingTable()

        # Adding Widgets
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.tableNew)
        self.setLayout(self.layout)

        # Displaying the window
        self.show()

    #Creating the table
    def creatingTable(self):
        self.tableNew = QTableWidget()

        # Giving the count for the Row 
        self.tableNew.setRowCount(4)

        # Giving the count for the Column
        self.tableNew.setColumnCount(2)

        self.tableNew.setItem(0, 0, QTableWidgetItem("Cell(1,1)"))
        self.tableNew.setItem(0, 1, QTableWidgetItem("Cell(1,2)"))
        self.tableNew.setItem(1, 0, QTableWidgetItem("Cell(2,1)"))
        self.tableNew.setItem(1, 1, QTableWidgetItem("Cell(2,2)"))
        self.tableNew.setItem(2, 0, QTableWidgetItem("Cell(3,1)"))
        self.tableNew.setItem(2, 1, QTableWidgetItem("Cell(3,2)"))
        self.tableNew.setItem(3, 0, QTableWidgetItem("Cell(4,1)"))
        self.tableNew.setItem(3, 1, QTableWidgetItem("Cell(4,2)"))

    # Adjusting the horizontal fir of the table
        self.tableNew.horizontalHeader().setStretchLastSection(True)
        self.tableNew.horizontalHeader().setSectionResizeMode(
            QHeaderView.Stretch)

Then, we will add the table widget and start to create a table. Next, we will define the rows and columns of the table and lastly, we will make the adjustments to the table.

if __name__ == '__main__':

    # creating the pyqt5 application    
    base = QApplication(sys.argv)

    # creating an instance of the created Window
    window = App()

    # starting the application 
    sys.exit(base.exec_())

Finally, we will create the application base, create an instance of the window and will execute the program.

Complete code :

import sys
from PyQt5.QtWidgets import *
                    

#Main Window
class App(QWidget):
    def __init__(self):
        super().__init__()
        # Setting the title
        self.title = 'PyQt5 Table - Python'
        # Setting the Position
        self.left = 0
        self.top = 0
        self.width = 400
        self.height = 250

        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
        
        # introducing a table
        self.creatingTable()

        # Adding Widgets
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.tableNew)
        self.setLayout(self.layout)

        # Displaying the window
        self.show()

    #Creating the table
    def creatingTable(self):
        self.tableNew = QTableWidget()

        # Giving the count for the Row 
        self.tableNew.setRowCount(4)

        # Giving the count for the Column
        self.tableNew.setColumnCount(2)

        self.tableNew.setItem(0, 0, QTableWidgetItem("Cell(1,1)"))
        self.tableNew.setItem(0, 1, QTableWidgetItem("Cell(1,2)"))
        self.tableNew.setItem(1, 0, QTableWidgetItem("Cell(2,1)"))
        self.tableNew.setItem(1, 1, QTableWidgetItem("Cell(2,2)"))
        self.tableNew.setItem(2, 0, QTableWidgetItem("Cell(3,1)"))
        self.tableNew.setItem(2, 1, QTableWidgetItem("Cell(3,2)"))
        self.tableNew.setItem(3, 0, QTableWidgetItem("Cell(4,1)"))
        self.tableNew.setItem(3, 1, QTableWidgetItem("Cell(4,2)"))

    # Adjusting the horizontal fir of the table
        self.tableNew.horizontalHeader().setStretchLastSection(True)
        self.tableNew.horizontalHeader().setSectionResizeMode(
            QHeaderView.Stretch)

if __name__ == '__main__':

    # creating the pyqt5 application    
    base = QApplication(sys.argv)

    # creating an instance of the created Window
    window = App()

    # starting the application 
    sys.exit(base.exec_())

Output:

The output of the code mentioned above is attached below in the form of a screenshot.