= Adding auto-completion to a QLineEdit =

On the `#pyqt` IRC channel on [[http://www.freenode.net|Freenode]], `filip` asked how to add auto-completion in a QLineEdit widget.

The following code shows how to use a QStringListModel to supply data to a QCompleter, itself used by a QLineEdit.

{{{
#!python
import sys
from PyQt4.QtCore import Qt
from PyQt4.QtGui import QApplication, QCompleter, QLineEdit, QStringListModel

def get_data(model):
    model.setStringList(["completion", "data", "goes", "here"])

if __name__ == "__main__":

    app = QApplication(sys.argv)
    edit = QLineEdit()
    completer = QCompleter()
    edit.setCompleter(completer)

    model = QStringListModel()
    completer.setModel(model)
    get_data(model)

    edit.show()
    sys.exit(app.exec_())
}}}

Note that, in a real application, you either need to keep a reference to the model or give it a QObject parent. Keeping a reference to the model enables you to update it with new data as required.