这篇教程Python PyQt5实战项目之查询器的实现流程详解写得很实用，希望能帮到您。
简介这是一个操作数据库（sqlite3）的项目，用PyQt5进行界面封装。
此次项目最主要的是，主界面与子界面的交互,一个主界面与三个子界面交互
可以添加数据，修改数据，删除数据
主界面class MainWidget(QMainWindow): def __init__(self): super(MainWidget,self).__init__() self.ui_init() self.connect_init() self.sql_init() def ui_init(self): self.setWindowTitle('信息查询') self.resize(600,700) self.addwidget = AddWidget() self.deletewidget = DeleteWidget() self.updatewidget = UpdateWidget() self.show_view = QTextBrowser() self.find_text = QLineEdit() self.find_btn = QPushButton() self.find_btn.setText('查询') self.update_btn = QPushButton() self.update_btn.setText('更改') self.delete_btn = QPushButton() self.delete_btn.setText('删除') self.add_btn = QPushButton() self.add_btn.setText('添加') self.status_bar = self.statusBar() self.widget = QWidget() self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.find_text) self.h1_layout.addWidget(self.find_btn) self.h2_layout.addWidget(self.update_btn) self.h2_layout.addWidget(self.delete_btn) self.h2_layout.addWidget(self.add_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.v_layout.addWidget(self.show_view) self.widget.setLayout(self.v_layout) self.setCentralWidget(self.widget) def connect_init(self): ''' 信号与槽 ''' '''查询功能''' self.find_btn.clicked.connect(lambda:self.find_slot(self.find_text.text())) '''添加功能''' self.add_btn.clicked.connect(self.add_slot) self.addwidget.add_close_signal.connect(lambda:self.setEnabled(True)) self.addwidget.add_start_signal.connect(self.add_start_slot) '''删除功能''' self.delete_btn.clicked.connect(self.delete_slot) self.deletewidget.delete_close_signal.connect(lambda:self.setEnabled(True)) self.deletewidget.delete_start_signal.connect(self.delete_start_slot) '''更新功能''' self.update_btn.clicked.connect(self.update_slot) self.updatewidget.update_close_signal.connect(lambda:self.setEnabled(True)) self.updatewidget.update_name_signal.connect(self.update_name_slot) self.updatewidget.update_show_signal.connect(self.update_show_slot) def sql_init(self): ''' sqllite3初始化 ''' try: conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('select * from design') cursor.close() conn.close() except: conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('create table design (id integer PRIMARY KEY AUTOINCREMENT,name varchar(20),show varchar(100))') cursor.close() conn.close() '''查询槽''' def find_slot(self,content): try: result = self.find_func(content) self.status_bar.showMessage('查询成功') if result: self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result))) for i in range(len(result)): self.show_view.append('id:' + str(result[i][0])) self.show_view.append('名称：' + result[i][1]) self.show_view.append('说明：' + result[i][2]) else: self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result))) except Exception as e: self.status_bar.showMessage('查询失败') print(e) '''添加槽''' def add_slot(self): self.addwidget.show() self.setEnabled(False) def add_start_slot(self,name,show): try: self.insert_func(name,show) self.status_bar.showMessage('添加成功') except Exception as e: self.status_bar.showMessage('添加失败') self.setEnabled(True) self.addwidget.name_text.clear() self.addwidget.show_text.clear() self.addwidget.close() '''删除槽''' def delete_slot(self): self.deletewidget.show() self.setEnabled(False) def delete_start_slot(self,id): try: self.delete_func(id) self.reset_func() self.status_bar.showMessage('删除成功') except Exception as e: self.status_bar.showMessage('删除失败') self.setEnabled(True) self.deletewidget.close() '''更新槽''' def update_slot(self): self.updatewidget.show() self.setEnabled(False) def update_name_slot(self,id,name): try: self.update_name_func(id,name) self.status_bar.showMessage('更新名称成功') except Exception as e: self.status_bar.showMessage('更新名称失败') self.setEnabled(True) self.updatewidget.close() def update_show_slot(self,id,name): try: self.update_show_func(id,name) self.status_bar.showMessage('更新名称成功') except Exception as e: self.status_bar.showMessage('更新名称失败') self.setEnabled(True) self.updatewidget.close() '''数据库函数''' def insert_func(self,name,show): ''' 插入信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('insert into design (id,name,show) values (null,"{}","{}")'.format(name,show)) cursor.close() conn.commit() conn.close() def find_func(self,content): ''' 查询信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('SELECT * FROM design WHERE name LIKE "%{}%"'.format(content)) result1 = cursor.fetchall() cursor.close() conn.close() return result1 def count_func(self): ''' 信息数目 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('select * from design') result = cursor.fetall() count = len(result) cursor.close() conn.close() return count def update_name_func(self,id,name): ''' 更新名称信息 ''' print(id,name) conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('update design set name = ? where id = ?',(name,id)) cursor.close() conn.commit() conn.close() def update_show_func(self,id,name): ''' 更新说明信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('update design set show = ? where id = ?',(name,id)) cursor.close() conn.commit() conn.close() def delete_func(self,id): ''' 删除信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('delete from design where id = ?',(id,)) cursor.close() conn.commit() conn.close() def reset_func(self): ''' 自增列归零 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'") cursor.close() conn.commit() conn.close()这个类包括主界面，数据库操作的函数，与其他界面操作的函数
当子界面打开时，主界面不可使用
子界面向主界面发送信号，功能实现代码都写在主界面类中
子界面需要在主界面声明，例如：self.addwidget = AddWidget() 添加功能槽 '''添加槽''' def add_slot(self): self.addwidget.show() self.setEnabled(False) def add_start_slot(self,name,show): try: self.insert_func(name,show) self.status_bar.showMessage('添加成功') except Exception as e: self.status_bar.showMessage('添加失败') self.setEnabled(True) self.addwidget.name_text.clear() self.addwidget.show_text.clear() self.addwidget.close()def add_slot(self): self.addwidget.show() self.setEnabled(False) 这个函数是用来启动添加界面和将主界面设置为不可用状态 def add_start_slot(self,name,show): try: self.insert_func(name,show) self.status_bar.showMessage('添加成功') except Exception as e: self.status_bar.showMessage('添加失败') self.setEnabled(True) self.addwidget.name_text.clear() self.addwidget.show_text.clear() self.addwidget.close()这个函数是添加功能的主要实现，调用数据库插入函数，数据插入完毕后，清除添加子界面的文本，最后关闭添加子界面。其他功能槽大同小异 def reset_func()
def reset_func(self): ''' 自增列归零 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'") cursor.close() conn.commit() conn.close()这个函数作用不是很大
只是将sqlite3数据库自带的系统表，数据库被创建时，sqlite_sequence表会被自动创建，该表包括两列。第一列为name，用来存储表的名称。第二列为seq，用来保存表对应的RowID的最大值，当对应的表增加记录，该表会自动更新。当表删除，该表对应的记录也会自动删除。
本来我是想当有数据删除时，ID值能重新更新，可是这个方法，只有当表内数据全部删除时，ID才会重新开始
添加数据的界面class AddWidget(QWidget): ''' 添加功能界面 ''' add_start_signal = pyqtSignal(str,str) add_close_signal = pyqtSignal() def __init__(self): super(AddWidget,self).__init__() self.ui_init() self.connect_init() def ui_init(self): self.setWindowTitle('添加信息') self.setFixedSize(300,200) self.name_text = QLineEdit() self.show_text = QTextEdit() self.start_btn = QPushButton() self.start_btn.setText('添加') self.cancel_btn = QPushButton() self.cancel_btn.setText('取消') self.name_label = QLabel() self.name_label.setText('名称：') self.show_label = QLabel() self.show_label.setText('说明：') self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.h3_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.name_label) self.h1_layout.addWidget(self.name_text) self.h2_layout.addWidget(self.show_label) self.h2_layout.addWidget(self.show_text) self.h3_layout.addWidget(self.start_btn) self.h3_layout.addWidget(self.cancel_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.v_layout.addLayout(self.h3_layout) self.setLayout(self.v_layout) def connect_init(self): self.start_btn.clicked.connect(self.start_slot) self.cancel_btn.clicked.connect(self.close_slot) def start_slot(self): name = self.name_text.text() show = self.show_text.toPlainText() self.add_start_signal.emit(name,show) def close_slot(self): self.close() self.add_close_signal.emit() def closeEvent(self, event): '''重写关闭事件''' self.add_close_signal.emit()这是添加数据的界面
自定义了两个信号
1.添加数据的信号，当按下添加按钮，这个界面向主界面传输两个字符串
2.结束这个界面的信号，不管是×了这个界面（重写了关闭事件）还是按下取消按钮，都向主界面发送信号，用来使主界面可以使用
删除数据的界面class DeleteWidget(QWidget): ''' 删除功能界面 ''' delete_cancel_signal = pyqtSignal() delete_start_signal = pyqtSignal(str) delete_close_signal = pyqtSignal() def __init__(self): super(DeleteWidget,self).__init__() self.ui_init() self.connect_init() def ui_init(self): self.setWindowTitle('删除信息') self.setFixedSize(300,100) self.id_text = QLineEdit() self.start_btn = QPushButton() self.start_btn.setText('删除') self.cancel_btn = QPushButton() self.cancel_btn.setText('取消') self.id_label = QLabel() self.id_label.setText('要删除的id：') self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.id_label) self.h1_layout.addWidget(self.id_text) self.h2_layout.addWidget(self.start_btn) self.h2_layout.addWidget(self.cancel_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.setLayout(self.v_layout) def connect_init(self): self.start_btn.clicked.connect(self.start_slot) self.cancel_btn.clicked.connect(self.close_slot) def start_slot(self): id = self.id_text.text() self.delete_start_signal.emit(id) def close_slot(self): self.close() self.delete_close_signal.emit() def closeEvent(self, event): self.delete_close_signal.emit()这是删除数据的界面，跟之前界面布局基本一样
修改数据的界面class UpdateWidget(QWidget): ''' 更新功能界面 ''' update_name_signal = pyqtSignal(int,str) update_show_signal = pyqtSignal(int,str) update_close_signal = pyqtSignal() def __init__(self): super(UpdateWidget,self).__init__() self.ui_init() self.connect_init() def ui_init(self): self.setWindowTitle('修改信息') self.setFixedSize(300,150) self.content_text = QLineEdit() self.id_text = QLineEdit() self.name_btn = QPushButton() self.name_btn.setText('修改名称') self.show_btn = QPushButton() self.show_btn.setText('修改说明') self.cancel_btn = QPushButton() self.cancel_btn.setText('取消') self.content_label = QLabel() self.content_label.setText('修改内容：') self.id_label = QLabel() self.id_label.setText('选择id为:') self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.h3_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.id_label) self.h1_layout.addWidget(self.id_text) self.h2_layout.addWidget(self.content_label) self.h2_layout.addWidget(self.content_text) self.h3_layout.addWidget(self.name_btn) self.h3_layout.addWidget(self.show_btn) self.h3_layout.addWidget(self.cancel_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.v_layout.addLayout(self.h3_layout) self.setLayout(self.v_layout) def connect_init(self): self.name_btn.clicked.connect(self.update_name_slot) self.show_btn.clicked.connect(self.update_show_slot) self.cancel_btn.clicked.connect(self.close_slot) def update_name_slot(self): id = self.id_text.text() id = int(id) content = self.content_text.text() self.update_name_signal.emit(id,content) def update_show_slot(self): id = self.id_text.text() id = int(id) content = self.content_text.text() self.update_show_signal.emit(id,content) def close_slot(self): self.close() self.update_close_signal.emit() def closeEvent(self, event): self.update_close_signal.emit()这个更新数据的界面，跟之前的界面的布局基本一样
全部代码import sysfrom PyQt5.QtCore import pyqtSignalfrom PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QPushButton, QTextEdit, QHBoxLayout, QVBoxLayout, QLineEdit, QLabel,QTextBrowser import sqlite3class MainWidget(QMainWindow): def __init__(self): super(MainWidget,self).__init__() self.ui_init() self.connect_init() self.sql_init() def ui_init(self): self.setWindowTitle('信息查询') self.resize(600,700) self.addwidget = AddWidget() self.deletewidget = DeleteWidget() self.updatewidget = UpdateWidget() self.show_view = QTextBrowser() self.find_text = QLineEdit() self.find_btn = QPushButton() self.find_btn.setText('查询') self.update_btn = QPushButton() self.update_btn.setText('更改') self.delete_btn = QPushButton() self.delete_btn.setText('删除') self.add_btn = QPushButton() self.add_btn.setText('添加') self.status_bar = self.statusBar() self.widget = QWidget() self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.find_text) self.h1_layout.addWidget(self.find_btn) self.h2_layout.addWidget(self.update_btn) self.h2_layout.addWidget(self.delete_btn) self.h2_layout.addWidget(self.add_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.v_layout.addWidget(self.show_view) self.widget.setLayout(self.v_layout) self.setCentralWidget(self.widget) def connect_init(self): ''' 信号与槽 ''' '''查询功能''' self.find_btn.clicked.connect(lambda:self.find_slot(self.find_text.text())) '''添加功能''' self.add_btn.clicked.connect(self.add_slot) self.addwidget.add_close_signal.connect(lambda:self.setEnabled(True)) self.addwidget.add_start_signal.connect(self.add_start_slot) '''删除功能''' self.delete_btn.clicked.connect(self.delete_slot) self.deletewidget.delete_close_signal.connect(lambda:self.setEnabled(True)) self.deletewidget.delete_start_signal.connect(self.delete_start_slot) '''更新功能''' self.update_btn.clicked.connect(self.update_slot) self.updatewidget.update_close_signal.connect(lambda:self.setEnabled(True)) self.updatewidget.update_name_signal.connect(self.update_name_slot) self.updatewidget.update_show_signal.connect(self.update_show_slot) def sql_init(self): ''' sqllite3初始化 ''' try: conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('select * from design') cursor.close() conn.close() except: conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('create table design (id integer PRIMARY KEY AUTOINCREMENT,name varchar(20),show varchar(100))') cursor.close() conn.close() '''查询槽''' def find_slot(self,content): try: result = self.find_func(content) self.status_bar.showMessage('查询成功') if result: self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result))) for i in range(len(result)): self.show_view.append('id:' + str(result[i][0])) self.show_view.append('名称：' + result[i][1]) self.show_view.append('说明：' + result[i][2]) else: self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result))) except Exception as e: self.status_bar.showMessage('查询失败') print(e) '''添加槽''' def add_slot(self): self.addwidget.show() self.setEnabled(False) def add_start_slot(self,name,show): try: self.insert_func(name,show) self.status_bar.showMessage('添加成功') except Exception as e: self.status_bar.showMessage('添加失败') self.setEnabled(True) self.addwidget.name_text.clear() self.addwidget.show_text.clear() self.addwidget.close() '''删除槽''' def delete_slot(self): self.deletewidget.show() self.setEnabled(False) def delete_start_slot(self,id): try: self.delete_func(id) self.reset_func() self.status_bar.showMessage('删除成功') except Exception as e: self.status_bar.showMessage('删除失败') self.setEnabled(True) self.deletewidget.close() '''更新槽''' def update_slot(self): self.updatewidget.show() self.setEnabled(False) def update_name_slot(self,id,name): try: self.update_name_func(id,name) self.status_bar.showMessage('更新名称成功') except Exception as e: self.status_bar.showMessage('更新名称失败') self.setEnabled(True) self.updatewidget.close() def update_show_slot(self,id,name): try: self.update_show_func(id,name) self.status_bar.showMessage('更新名称成功') except Exception as e: self.status_bar.showMessage('更新名称失败') self.setEnabled(True) self.updatewidget.close() '''数据库函数''' def insert_func(self,name,show): ''' 插入信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('insert into design (id,name,show) values (null,"{}","{}")'.format(name,show)) cursor.close() conn.commit() conn.close() def find_func(self,content): ''' 查询信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('SELECT * FROM design WHERE name LIKE "%{}%"'.format(content)) result1 = cursor.fetchall() cursor.close() conn.close() return result1 def count_func(self): ''' 信息数目 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('select * from design') result = cursor.fetchall() count = len(result) cursor.close() conn.close() return count def update_name_func(self,id,name): ''' 更新名称信息 ''' print(id,name) conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('update design set name = ? where id = ?',(name,id)) cursor.close() conn.commit() conn.close() def update_show_func(self,id,name): ''' 更新说明信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('update design set show = ? where id = ?',(name,id)) cursor.close() conn.commit() conn.close() def delete_func(self,id): ''' 删除信息 ''' conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute('delete from design where id = ?',(id,)) cursor.close() conn.commit() conn.close() def reset_func(self): conn = sqlite3.connect('find.db') cursor = conn.cursor() cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'") cursor.close() conn.commit() conn.close()class AddWidget(QWidget): ''' 添加功能界面 ''' add_start_signal = pyqtSignal(str,str) add_close_signal = pyqtSignal() def __init__(self): super(AddWidget,self).__init__() self.ui_init() self.connect_init() def ui_init(self): self.setWindowTitle('添加信息') self.setFixedSize(300,200) self.name_text = QLineEdit() self.show_text = QTextEdit() self.start_btn = QPushButton() self.start_btn.setText('添加') self.cancel_btn = QPushButton() self.cancel_btn.setText('取消') self.name_label = QLabel() self.name_label.setText('名称：') self.show_label = QLabel() self.show_label.setText('说明：') self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.h3_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.name_label) self.h1_layout.addWidget(self.name_text) self.h2_layout.addWidget(self.show_label) self.h2_layout.addWidget(self.show_text) self.h3_layout.addWidget(self.start_btn) self.h3_layout.addWidget(self.cancel_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.v_layout.addLayout(self.h3_layout) self.setLayout(self.v_layout) def connect_init(self): self.start_btn.clicked.connect(self.start_slot) self.cancel_btn.clicked.connect(self.close_slot) def start_slot(self): name = self.name_text.text() show = self.show_text.toPlainText() self.add_start_signal.emit(name,show) def close_slot(self): self.close() self.add_close_signal.emit() def closeEvent(self, event): self.add_close_signal.emit() class DeleteWidget(QWidget): ''' 删除功能界面 ''' delete_cancel_signal = pyqtSignal() delete_start_signal = pyqtSignal(str) delete_close_signal = pyqtSignal() def __init__(self): super(DeleteWidget,self).__init__() self.ui_init() self.connect_init() def ui_init(self): self.setWindowTitle('删除信息') self.setFixedSize(300,100) self.id_text = QLineEdit() self.start_btn = QPushButton() self.start_btn.setText('删除') self.cancel_btn = QPushButton() self.cancel_btn.setText('取消') self.id_label = QLabel() self.id_label.setText('要删除的id：') self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.id_label) self.h1_layout.addWidget(self.id_text) self.h2_layout.addWidget(self.start_btn) self.h2_layout.addWidget(self.cancel_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.setLayout(self.v_layout) def connect_init(self): self.start_btn.clicked.connect(self.start_slot) self.cancel_btn.clicked.connect(self.close_slot) def start_slot(self): id = self.id_text.text() self.delete_start_signal.emit(id) def close_slot(self): self.close() self.delete_close_signal.emit() def closeEvent(self, event): self.delete_close_signal.emit()class UpdateWidget(QWidget): ''' 更新功能界面 ''' update_name_signal = pyqtSignal(int,str) update_show_signal = pyqtSignal(int,str) update_close_signal = pyqtSignal() def __init__(self): super(UpdateWidget,self).__init__() self.ui_init() self.connect_init() def ui_init(self): self.setWindowTitle('修改信息') self.setFixedSize(300,150) self.content_text = QLineEdit() self.id_text = QLineEdit() self.name_btn = QPushButton() self.name_btn.setText('修改名称') self.show_btn = QPushButton() self.show_btn.setText('修改说明') self.cancel_btn = QPushButton() self.cancel_btn.setText('取消') self.content_label = QLabel() self.content_label.setText('修改内容：') self.id_label = QLabel() self.id_label.setText('选择id为:') self.h1_layout = QHBoxLayout() self.h2_layout = QHBoxLayout() self.h3_layout = QHBoxLayout() self.v_layout = QVBoxLayout() self.h1_layout.addWidget(self.id_label) self.h1_layout.addWidget(self.id_text) self.h2_layout.addWidget(self.content_label) self.h2_layout.addWidget(self.content_text) self.h3_layout.addWidget(self.name_btn) self.h3_layout.addWidget(self.show_btn) self.h3_layout.addWidget(self.cancel_btn) self.v_layout.addLayout(self.h1_layout) self.v_layout.addLayout(self.h2_layout) self.v_layout.addLayout(self.h3_layout) self.setLayout(self.v_layout) def connect_init(self): self.name_btn.clicked.connect(self.update_name_slot) self.show_btn.clicked.connect(self.update_show_slot) self.cancel_btn.clicked.connect(self.close_slot) def update_name_slot(self): id = self.id_text.text() id = int(id) content = self.content_text.text() self.update_name_signal.emit(id,content) def update_show_slot(self): id = self.id_text.text() id = int(id) content = self.content_text.text() self.update_show_signal.emit(id,content) def close_slot(self): self.close() self.update_close_signal.emit() def closeEvent(self, event): self.update_close_signal.emit() if __name__ == '__main__': app = QApplication(sys.argv) dispaly = MainWidget() dispaly.show() sys.exit(app.exec_())
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