pyqt5 sqlite3搜索功能

Question

现在，我正在制作一个名为“学生信息”的GUI，您可以在其中添加学生姓名，姓氏，电话号码，年份，地址，还可以通过从tableWidget中选择ID来删除ID，还可以更新学生姓名，姓氏，电话号码，年份，地址。这就是我所做的所有功能。现在，我正在尝试使用搜索功能，在其中您可以按姓名和姓氏搜索学生，并在qlineedit_name，qlineedit_surname，qlineedit_phonenumber等中显示学生的姓名，姓氏，电话号码，年份，地址等。但是即使我不这样做，我也无法使用不知道如何实现该功能。

在代码中，有些东西是用我的语言编写的，所以不必太在意，应该重点放在如何使搜索功能上

from PyQt5 import QtWidgets, uic
from PyQt5.QtWidgets import *
from sqlitehelper import *


app = QtWidgets.QApplication([])
dlg = uic.loadUi("test2.ui")
helper = sqlitehelper("Data.db")
helper.createtable()
def loadData():

    users = helper.select("SELECT * FROM users")

    for row_number,user in enumerate(users):
        dlg.tableWidget.insertRow(row_number)
        for column_number,data in enumerate(user):
            cell = QtWidgets.QTableWidgetItem(str(data))
            dlg.tableWidget.setItem(row_number,column_number,cell)

def clearData():
    dlg.tableWidget.clearSelection()
    while(dlg.tableWidget.rowCount()>0):
        dlg.tableWidget.removeRow(0)
        dlg.tableWidget.clearSelection()


def autorefresh():
    clearData()
    loadData()

def add_user():
    name = dlg.lineEdit.text()
    surname = dlg.lineEdit_2.text()
    fathersname = dlg.lineEdit_3.text()
    year = dlg.lineEdit_4.text()
    try:
        if name.strip(" ") != "" and surname.strip(" ") != "" and year.strip(" ") != "" :
            user = (name,surname,fathersname,int(year))
            helper.insert("INSERT INTO users (name,surname,fathersname,year) VALUES(?,?,?,?)",user,)
            autorefresh()
            dlg.lineEdit.setText(name)
            dlg.lineEdit_2.setText(surname)
            dlg.lineEdit_3.setText(fathersname)
            dlg.lineEdit_4.setText(year)
        else:
            show_message("Hoho")
    except Exception:
        show_message1("Ýalňyşlyk!")


def delete_user():
    id_delete = get_selected_user_by_id()
    helper.delete("DELETE FROM users WHERE id="+id_delete)
    autorefresh()


def update_user():
    id_update = get_selected_user_by_id()
    name = dlg.lineEdit.text()
    surname = dlg.lineEdit_2.text()
    fathersname = dlg.lineEdit_3.text()
    year = dlg.lineEdit_4.text()
    try:
        if name.strip(" ") != "" and surname.strip(" ") != "" and year.strip(" ") != "" :
            user = (name,surname,fathersname,int(year))
            helper.update("UPDATE users SET name=?,surname=?,fathersname=?,year=? WHERE id="+id_update,user)
            autorefresh()
            dlg.lineEdit.setText(name)
            dlg.lineEdit_2.setText(surname)
            dlg.lineEdit_3.setText(fathersname)
            dlg.lineEdit_4.setText(year)
        else:
            show_message("Yalnyshlyk")    


    except Exception:
        show_message("Ýalňyşlyk")
        show_message1("Ýalňyşlyk!")


def selection_changed():
    selected_row_by_id = get_selected_row_by_id()
    selected_user_by_id = get_selected_user_by_id()
    name = dlg.tableWidget.item(selected_row_by_id,1).text()
    surname = dlg.tableWidget.item(selected_row_by_id,2).text()
    fathersname = dlg.tableWidget.item(selected_row_by_id,3).text()
    year = dlg.tableWidget.item(selected_row_by_id,4).text()
    dlg.lineEdit.setText(name)
    dlg.lineEdit_2.setText(surname)
    dlg.lineEdit_3.setText(fathersname)
    dlg.lineEdit_4.setText(year)

def get_selected_user_by_id():
    return dlg.tableWidget.item(get_selected_row_by_id(), 0).text()

def get_selected_row_by_id():
    return dlg.tableWidget.currentRow()
def show_message1(Title = "Ýalňyşlyk", message = "Ýyla diňe san girizmeli"):
    QMessageBox.information(None,Title,message)
def show_message(Title = "Ýalňyşlyk", message = "Hökman ADY, FAMILIÝASY, DOGLAN ÝYLY girizilmeli"):
    QMessageBox.information(None,Title,message)



dlg.pushButton.clicked.connect(add_user)
dlg.pushButton_2.clicked.connect(delete_user)
dlg.pushButton_3.clicked.connect(update_user)


dlg.tableWidget.itemSelectionChanged.connect(selection_changed)
loadData()
dlg.show()
app.exec()

我正在尝试提供搜索功能，在其中可以按姓名和姓氏搜索学生，并在qlineedit_name，qlineedit_surname，qlineedit_phonenumber等中显示学生的姓名，姓氏，电话号码，年份，地址。