Using a search bar to find items in a list - pyqt5

Question

I want to use a line edit as a search bar in order to find items in a Qlistwidget. I also want the qlistwidget to scroll up/down (in search) as text is being changed in the line edit.
import sys
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QGridLayout, QWidget, QListWidget, QLineEdit
class Window(QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
centralWidget = QWidget()
self.setCentralWidget(centralWidget)
self.ListBox = QListWidget()
self.ListBox.insertItem(0,'Temperature')
self.ListBox.insertItem(1,'Mass')
self.ListBox.insertItem(2,'Length')
self.ListBox.insertItem(3,'Height')
self.ListBox.insertItem(4,'Width')
self.ListBox.insertItem(5,'Volume')
self.ListBox.insertItem(6,'Surface_Area')
self.ListBox.insertItem(7,'Material')
self.ListBox.insertItem(8,'Location')
self.ListBox.insertItem(9,'Strength')
self.ListBox.insertItem(10,'Color')
self.Search_Bar = QLineEdit()
layout = QGridLayout(centralWidget)
layout.addWidget(self.ListBox)
layout.addWidget(self.Search_Bar)
self.Search_Bar.textChanged.connect(self.Search)
def Search(self):
if self.Search_Bar.text() == 'Strength':
pass
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())

Answer 1

The internally implemented match function provided by all Qt item models is usually faster than cycling through the list via Python.
def Search(self, text):
model = self.ListBox.model()
match = model.match(
model.index(0, self.ListBox.modelColumn()),
QtCore.Qt.DisplayRole,
text,
hits=1,
flags=QtCore.Qt.MatchStartsWith)
if match:
self.ListBox.setCurrentIndex(match[0])
This will automatically select and scroll to the first item found (if any).