PyQt5 - Fail to display QTableWidgetItem data if previous cell have same value?

[Saelyth]

I can't edit main post O,o.

So more data and tests: Assuming we have only 1 record:
['03/08/2017', 'Otras nuevas facturas', '16/08/2017', 333333, '11123', 'No', 'No', 'No']
The last 2 columns will appear as invisible, because they share the same value.

With the next example, column 3 appears empty... because 16/08/2017 is also the data in column 1.
['16/08/2017', 'Otras nuevas facturas', '16/08/2017', 333333, '11123', 'No', 'Yadda', 'Test']

Per row, it somehow only shows the first value if there is duplicated data. Why?

Apparently this problem has been here for years: https://stackoverflow.com/questions/...uplicate-items

[ChrisW67]

Did you see this in the QTableWidget docs?

If you want to enable sorting in your table widget, do so after you have populated it with items, otherwise sorting may interfere with the insertion order (see setItem() for details).

Try disabling sorting before the load, loading,and then enabling sorting.

[Saelyth]

I actually saw it, but it didn't specified "sorting won't let you add duplicated items to the same row" so I didn't tried to change.

Now I tried the next code but the same behaviour still happens. Repeated data won't show:

self.tablaBuscador.setSortingEnabled(False)
self.tablaBuscador.setItem(...)
self.tablaBuscador.setSortingEnabled(True)

I even tried to disable sorting entirely and use a non-sorted table, but yet if there is repeated data like "something", "something", "something", the last one won't appear, instead an empty editable cell is inserted.

Edit: Recorded video with my crap phone just to make clear the issue: https://twitter.com/Saelyth/status/898196447425855488

Edit 2: Someone as newbie as me would expect a "enableDuplicates" setting, because I don't understand why a row can't have 2-3 cells with the same exact data. By default it should allow it, and only disable it if we specifically want.

[Saelyth]

Stubborn me want to keep you guys informed of my newbie research advances.

Test Script for python where you can see the bug (easier for you to execute and see yourself than me trying to explain in english):

import sys
from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QAction, QTableWidget,QTableWidgetItem,QVBoxLayout
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot, Qt
 
class App(QWidget):
 
    def __init__(self):
        super().__init__()
        self.title = 'PyQt5 table - pythonspot.com'
        self.left = 200
        self.top = 200
        self.width = 800
        self.height = 200
        self.initUI()
 
    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
 
        self.createTable()
 
        # Add box layout, add table to box layout and add box layout to widget
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.tableWidget) 
        self.setLayout(self.layout) 
 
        # Show widget
        self.show()
 
     def createTable(self):
       # Create table
        self.tableWidget = QTableWidget()
        self.tableWidget.setRowCount(2)
        self.tableWidget.setColumnCount(6)
        self.tableWidget.setHorizontalHeaderLabels(["algo", "algo", "algo", "algo", "algo", "algo"])
        registros = ["Celda", "Celda", "Celda", "Celda", "Celda", "Celda"]
        # BUGGED ROW
        for dato in registros:
            registroitem = QTableWidgetItem(dato)
            self.tableWidget.setItem(0, registros.index(dato), QTableWidgetItem(registroitem))
        # NON BUGGED ROW
        self.tableWidget.setItem(1,0, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,1, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,2, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,3, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,4, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,5, QTableWidgetItem("Celda"))
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

import sys
from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QAction, QTableWidget,QTableWidgetItem,QVBoxLayout
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot, Qt
 
class App(QWidget):
 
    def __init__(self):
        super().__init__()
        self.title = 'PyQt5 table - pythonspot.com'
        self.left = 200
        self.top = 200
        self.width = 800
        self.height = 200
        self.initUI()
 
    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
 
        self.createTable()
 
        # Add box layout, add table to box layout and add box layout to widget
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.tableWidget) 
        self.setLayout(self.layout) 
 
        # Show widget
        self.show()
 
     def createTable(self):
       # Create table
        self.tableWidget = QTableWidget()
        self.tableWidget.setRowCount(2)
        self.tableWidget.setColumnCount(6)
        self.tableWidget.setHorizontalHeaderLabels(["algo", "algo", "algo", "algo", "algo", "algo"])
        registros = ["Celda", "Celda", "Celda", "Celda", "Celda", "Celda"]
        # BUGGED ROW
        for dato in registros:
            registroitem = QTableWidgetItem(dato)
            self.tableWidget.setItem(0, registros.index(dato), QTableWidgetItem(registroitem))
        # NON BUGGED ROW
        self.tableWidget.setItem(1,0, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,1, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,2, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,3, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,4, QTableWidgetItem("Celda"))
        self.tableWidget.setItem(1,5, QTableWidgetItem("Celda"))
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

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Which pretty much says (your bug is on the loop). I still don't know what causes it but getting closer . Any hint?

Edit + FIX: I am retard.... it actually seems that it was a python noob fail all this time. registros.index(dato) was always returning the first index if it's a duplicated (0). I've been coding on python 4 years and never realized about this, hence I though it was a Qt issue.

Fix: replace "for dato in registros:" and add "for index, dato in enumerate(registro):" instead.

My apologies guys, thread can be closed.

[d_stranz]

registros.index(dato) was always returning the first index if it's a duplicated (0).

Sort of makes sense though - if you are asking to look up something by value, and that value is duplicated, how should it know you want the second one and not the first? The only way to give that information is with a second argument to index() that tells it where to start, something like index( value, startIndex ).