QT4 Table

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We can show a table using the QTableWidget, part of the PyQt module. We set the title, row count, column count and add the data.

Related course:

Create GUI Apps with PyQt5

Qt4 Table example

An example below:

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

def main():
    app 	= QApplication(sys.argv)
    table 	= QTableWidget()
    tableItem 	= QTableWidgetItem()
    
    # initiate table
    table.setWindowTitle("QTableWidget Example @pythonspot.com")
    table.resize(400, 250)
    table.setRowCount(4)
    table.setColumnCount(2)
    
    # set data
    table.setItem(0,0, QTableWidgetItem("Item (1,1)"))
    table.setItem(0,1, QTableWidgetItem("Item (1,2)"))
    table.setItem(1,0, QTableWidgetItem("Item (2,1)"))
    table.setItem(1,1, QTableWidgetItem("Item (2,2)"))
    table.setItem(2,0, QTableWidgetItem("Item (3,1)"))
    table.setItem(2,1, QTableWidgetItem("Item (3,2)"))
    table.setItem(3,0, QTableWidgetItem("Item (4,1)"))
    table.setItem(3,1, QTableWidgetItem("Item (4,2)"))
    
    # show table
    table.show()
    return app.exec_()

if __name__ == '__main__':
    main()

Result:

PyQt Table

QTableWidget labels

You can set the header using the setHorizontalHeaderLabels() function. The same applies for vertical labels. A qt4 demonstration below:

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

def main():
    app 	= QApplication(sys.argv)
    table 	= QTableWidget()
    tableItem 	= QTableWidgetItem()
    
    # initiate table
    table.setWindowTitle("QTableWidget Example @pythonspot.com")
    table.resize(400, 250)
    table.setRowCount(4)
    table.setColumnCount(2)
    
    # set label
    table.setHorizontalHeaderLabels(QString("H1;H2;").split(";"))
    table.setVerticalHeaderLabels(QString("V1;V2;V3;V4").split(";"))
    
    # set data
    table.setItem(0,0, QTableWidgetItem("Item (1,1)"))
    table.setItem(0,1, QTableWidgetItem("Item (1,2)"))
    table.setItem(1,0, QTableWidgetItem("Item (2,1)"))
    table.setItem(1,1, QTableWidgetItem("Item (2,2)"))
    table.setItem(2,0, QTableWidgetItem("Item (3,1)"))
    table.setItem(2,1, QTableWidgetItem("Item (3,2)"))
    table.setItem(3,0, QTableWidgetItem("Item (4,1)"))
    table.setItem(3,1, QTableWidgetItem("Item (4,2)"))
    
    # show table
    table.show()
    return app.exec_()

if __name__ == '__main__':
    main()

Result:

PyQT Table

Note: These days you can use pyqt5 to create a pyqt table.

QTableWidget click events

We can detect cell clicks using this procedure, first add a function:

# on click function
table.cellClicked.connect(cellClick)

Then define the function:

def cellClick(row,col):
print "Click on " + str(row) + " " + str(col)

The Python programming language starts counting with 0, so when you press on (1,1) you will see (0,0). Full code to detect table clicks:

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

def cellClick(row,col):
    print "Click on " + str(row) + " " + str(col)

def main():
    app 	= QApplication(sys.argv)
    table 	= QTableWidget()
    tableItem 	= QTableWidgetItem()

    # initiate table
    table.setWindowTitle("QTableWidget Example @pythonspot.com")
    table.resize(400, 250)
    table.setRowCount(4)
    table.setColumnCount(2)
    
    # set label
    table.setHorizontalHeaderLabels(QString("H1;H2;").split(";"))
    table.setVerticalHeaderLabels(QString("V1;V2;V3;V4").split(";"))
    
    # set data
    table.setItem(0,0, QTableWidgetItem("Item (1,1)"))
    table.setItem(0,1, QTableWidgetItem("Item (1,2)"))
    table.setItem(1,0, QTableWidgetItem("Item (2,1)"))
    table.setItem(1,1, QTableWidgetItem("Item (2,2)"))
    table.setItem(2,0, QTableWidgetItem("Item (3,1)"))
    table.setItem(2,1, QTableWidgetItem("Item (3,2)"))
    table.setItem(3,0, QTableWidgetItem("Item (4,1)"))
    table.setItem(3,1, QTableWidgetItem("Item (4,2)"))
    
    # on click function
    table.cellClicked.connect(cellClick)
    
    # show table
    table.show()
    return app.exec_()

if __name__ == '__main__':
    main()

If you want to show the cell/row numbers in a non-programmer way use this instead:

def cellClick(row,col):
print "Click on " + str(row+1) + " " + str(col+1)

Tooltip text

We can set tooltip (mouse over) text using the method. If you set tooltips on non-existing columns you will get an error.

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

def main():
    app 	= QApplication(sys.argv)
    table 	= QTableWidget()
    tableItem 	= QTableWidgetItem()
    
    # initiate table
    table.setWindowTitle("QTableWidget Example @pythonspot.com")
    table.resize(400, 250)
    table.setRowCount(4)
    table.setColumnCount(2)
    
    # set label
    table.setHorizontalHeaderLabels(QString("H1;H2;").split(";"))
    table.setVerticalHeaderLabels(QString("V1;V2;V3;V4").split(";"))
    
    # set data
    table.setItem(0,0, QTableWidgetItem("Item (1,1)"))
    table.setItem(0,1, QTableWidgetItem("Item (1,2)"))
    table.setItem(1,0, QTableWidgetItem("Item (2,1)"))
    table.setItem(1,1, QTableWidgetItem("Item (2,2)"))
    table.setItem(2,0, QTableWidgetItem("Item (3,1)"))
    table.setItem(2,1, QTableWidgetItem("Item (3,2)"))
    table.setItem(3,0, QTableWidgetItem("Item (4,1)"))
    table.setItem(3,1, QTableWidgetItem("Item (4,2)"))
    
    # tooltip text
    table.horizontalHeaderItem(0).setToolTip("Column 1 ")
    table.horizontalHeaderItem(1).setToolTip("Column 2 ")
    
    # show table
    table.show()
    return app.exec_()

if __name__ == '__main__':
    main()

Result:

PyQT Table tooltips

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Back Next

Posted in qt4

2015-05-03

Leave a Reply:

Smgk • Wed, 22 Jul 2015

How can I make the Table not be in the corner or the window? And how can I put 2 buttons in a single entry of a table?

Frank • Wed, 22 Jul 2015

Hi, I recommend QTCreator for this. It will generate the code for you

Chen • Sun, 23 Aug 2015

hello!I want to read the items selected,how to define the signal and slot?Thank you

Frank • Sun, 23 Aug 2015

Use itemSelectionChanged.connect() to receive the selections. I have created an example of selection with a QTableWidget below. I've changed the code slightly to be object oriented, but the other method should work too.

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys

class QTable(QTableWidget):
    @pyqtSlot()
    def on_click(self):
        print("\n")
        for currentQTableWidgetItem in self.selectedItems():
            print currentQTableWidgetItem.row(), currentQTableWidgetItem.column(), currentQTableWidgetItem.text()

    def __init__(self, parentQWidget = None):
        super(QTable, self).__init__(parentQWidget)

        # initiate table
        self.setWindowTitle("QTableWidget Example @pythonspot.com")
        self.resize(400, 250)
        self.setRowCount(4)
        self.setColumnCount(2)

        # set data
        self.setItem(0,0, QTableWidgetItem("Item (1,1)"))
        self.setItem(0,1, QTableWidgetItem("Item (1,2)"))
        self.setItem(1,0, QTableWidgetItem("Item (2,1)"))
        self.setItem(1,1, QTableWidgetItem("Item (2,2)"))
        self.setItem(2,0, QTableWidgetItem("Item (3,1)"))
        self.setItem(2,1, QTableWidgetItem("Item (3,2)"))
        self.setItem(3,0, QTableWidgetItem("Item (4,1)"))
        self.setItem(3,1, QTableWidgetItem("Item (4,2)"))

        # table selection change
        self.itemSelectionChanged.connect(self.on_click)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    mytable = QTable()
    mytable.show()
    app.exec_()

Hussain Dholkawala • Thu, 17 Sep 2015

I am trying track double click on a table cell and get value of the cell? I am using python 2.7 and pyQt how do i do that?

Frank • Thu, 17 Sep 2015

Change to self.doubleClicked.connect. Here is a working example:

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys
 
class QTable(QTableWidget):
    @pyqtSlot()
    def on_click(self):
        print("\n")
        for currentQTableWidgetItem in self.selectedItems():
            print currentQTableWidgetItem.row(), currentQTableWidgetItem.column(), currentQTableWidgetItem.text()
 
    def __init__(self, parentQWidget = None):
        super(QTable, self).__init__(parentQWidget)
 
        # initiate table
        self.setWindowTitle("QTableWidget Example @pythonspot.com")
        self.resize(400, 250)
        self.setRowCount(4)
        self.setColumnCount(2)
 
        # set data
        self.setItem(0,0, QTableWidgetItem("Item (1,1)"))
        self.setItem(0,1, QTableWidgetItem("Item (1,2)"))
        self.setItem(1,0, QTableWidgetItem("Item (2,1)"))
        self.setItem(1,1, QTableWidgetItem("Item (2,2)"))
        self.setItem(2,0, QTableWidgetItem("Item (3,1)"))
        self.setItem(2,1, QTableWidgetItem("Item (3,2)"))
        self.setItem(3,0, QTableWidgetItem("Item (4,1)"))
        self.setItem(3,1, QTableWidgetItem("Item (4,2)"))
 
        # table selection change
        self.doubleClicked.connect(self.on_click)
 
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    mytable = QTable()
    mytable.show()
    app.exec_()

Iman Shadmehri • Tue, 03 Nov 2015

very useful
Thanks

Gorzo • Sun, 10 Jan 2016

How I can make variable number of column entries in table. I want user to have "add column" choice that will add a new column and allow changing number of entries. How I make this?

Michel • Wed, 13 Jan 2016

Hi, how can I make a table that can collapse?

Frank • Thu, 28 Jan 2016

People recommend a QTreeView for this, haven't tried it myself. http://stackoverflow.com/qu...

Frank • Sat, 30 Jan 2016

Create an onbutton event. In the event of a button click, resize the table and call the show table method.

Ayoub • Mon, 30 May 2016

Thank so mush ....
The PyQt Tutorials are limited out there... comparing it the monster of Oracl(Javafx) ...
You saved for me a 2+ hours of searching on web ... thank you ... Keep up the good work.

Eli • Mon, 20 Jun 2016

Hallo,

thank you for this helpful post. I am trying to get the values entered by the user and put them in a list but
I get this error: NoneType' object has no attribute 'text
Any idea?
thanx!

This is my code:
[python]
mytable = self.dlg.tableWidget
lista = []
listb = []
# i is always in range 4 in my code
for i in range(4):
# j is always the length of the unique values list of a field of a qgis layer,
# selected by the user on a previous step
for j in range(un_values_len):
a_item = mytable.item(i, j)
a_name = str(a_item.text())
lista.append(a_item)
listb.append(a_name)

print lista, listb
[/python]