sample.py

## -*- coding: utf-8 -*-
#model/viewの基本
import sys
from PySide2 import QtCore, QtWidgets


class testView(QtWidgets.QDialog):

    def __init__(self, parent=None):

        super(testView, self).__init__(parent)

        layout = QtWidgets.QVBoxLayout()
        self.setLayout(layout)

        self.view = QtWidgets.QListView()
        self.edit = QtWidgets.QLineEdit()
        layout.addWidget(self.view)
        layout.addWidget(self.edit)

        #中のデータ（モデル）を作成して、Viewにセット
        self.model = QtCore.QStringListModel(["test", "a", "b", "c", "hello world"])
        self.proxy = QtCore.QSortFilterProxyModel()
        self.proxy.setSourceModel(self.model)
        self.view.setModel(self.proxy)

        self.edit.textChanged.connect(self.setRegexp)

    def setRegexp(self):

        regExp = QtCore.QRegExp(
            self.edit.text(),
            QtCore.Qt.CaseSensitive,
            QtCore.QRegExp.Wildcard
        )
        self.proxy.setFilterRegExp(regExp)
        self.proxy.layoutChanged.emit()


#アプリケーション実行
app = QtWidgets.QApplication(sys.argv)
test = testView()
test.show()
sys.exit(app.exec_())