Remove default numbers from QHeaderView when using a custom label in the header - pyqt5

Question

I am attempting to customize a QHeaderView in order to create custom labels that span two or more columns. In the code below, I have done this by placing a QLabel over the appropriate sections of the overall header. However, the default header numbering of the individual columns still appears as shown below. How can this be removed? I would prefer to do this without adding a background colour to each label.
import sys
from PySide6.QtCore import *
from PySide6.QtGui import *
from PySide6.QtWidgets import *
class CustomHeader(QHeaderView):
def __init__(self, orientation, labels, parent=None):
QHeaderView.__init__(self, orientation, parent=None)
self.sectionResized.connect(self.handleSectionResized)
self.label_text = labels
self.labels = list()
self.setFixedHeight(40)
def handleSectionResized(self, i):
start = self.visualIndex(i)
stop = self.count()
for i in range(start, stop):
self.labels[i].setGeometry(self.sectionViewportPosition(i), 0, self.sectionSize(i) - 5, self.height())
self.labels[i].show()
def showEvent(self, event):
for i in range(len(self.label_text)):
label = QLabel(self.label_text[i], self)
label.setAlignment(Qt.AlignCenter)
widget = QWidget(self)
vbox = QVBoxLayout()
vbox.setSpacing(0)
vbox.setContentsMargins(0,0,0,0)
vbox.addWidget(label)
widget.setLayout(vbox)
widget.show()
self.labels.append(widget)
self.adjustPositions()
return super().showEvent(event)
def adjustPositions(self):
for index, label in enumerate(self.labels):
if index == 1 or index == 3:
size = self.sectionSize(index)
print(size)
geom = QRect(
self.sectionViewportPosition(index),
0,
200,
self.height(),
)
else:
size = self.sectionSize(index)
print(size)
geom = QRect(
self.sectionViewportPosition(index),
0,
self.sectionSize(index),
self.height(),
)
geom.adjust(2, 0, -2, 0)
label.setGeometry(geom)
class MyTable(QTableWidget):
def __init__(self, nrow, ncol, parent=None):
super().__init__(nrow, ncol, parent=parent)
self.verticalHeader().hide()
self.setHorizontalHeaderLabels([])
labels = ['One', 'Two', '', 'Three'] #, 'Four', 'Five']
self.header = CustomHeader(Qt.Horizontal, labels, self)
self.setHorizontalHeader(self.header)
self.setSelectionBehavior(QAbstractItemView.SelectItems)
self.setEditTriggers(QAbstractItemView.NoEditTriggers)
data = [
[3, 20, 40, 25, 45],
[5, 22, 42, 27, 47],
]
for i in range(2):
for j in range(5):
item = QTableWidgetItem(str(data[i-2][j]))
self.setItem(i, j, item)
item.setBackground(Qt.white)
if __name__ == '__main__':
app = QApplication(sys.argv)
table = MyTable(7, 5)
table.show()
sys.exit(app.exec())

Answer 1

You could change them the same way you would with the standard header.
In your QTableWidget just call:
self.setHorizontalHeaderLabels([""] * self.columnCount())
For example:
class MyTable(QTableWidget):
def __init__(self, nrow, ncol, parent=None):
super().__init__(nrow, ncol, parent=parent)
self.verticalHeader().hide()
self.setHorizontalHeaderLabels([])
labels = ['One', 'Two', '', 'Three'] #, 'Four', 'Five']
self.header = CustomHeader(Qt.Horizontal, labels, self)
self.setHorizontalHeaderLabels([""] * self.columnCount()) # added this
self.setHorizontalHeader(self.header)
self.setSelectionBehavior(QAbstractItemView.SelectItems)
self.setEditTriggers(QAbstractItemView.NoEditTriggers)