使用pycharm中qtdsinger、pyuic设计一个绘画板用来识别鼠标写的数字完整代码

好的，以下是一个完整的代码示例，包括UI文件和Python代码：

UI文件（mypaint.ui）：

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>400</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>绘画板</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <widget class="QLabel" name="label">
    <property name="geometry">
     <rect>
      <x>40</x>
      <y>40</y>
      <width>320</width>
      <height>320</height>
     </rect>
    </property>
    <property name="text">
     <string/>
    </property>
   </widget>
   <widget class="QPushButton" name="pushButton">
    <property name="geometry">
     <rect>
      <x>160</x>
      <y>370</y>
      <width>80</width>
      <height>25</height>
     </rect>
    </property>
    <property name="text">
     <string>清除</string>
    </property>
   </widget>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

Python代码（main.py）：

from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtGui import QPixmap, QPainter, QPen
from PyQt5.QtCore import Qt
import sys
import mypaint

class MyPaint(QMainWindow, mypaint.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MyPaint, self).__init__(parent)
        self.setupUi(self)
        self.label.setPixmap(QPixmap(self.label.size()))
        self.pushButton.clicked.connect(self.clear_canvas)
        self.label.mousePressEvent = self.record_mouse_track
        self.label.mouseMoveEvent = self.record_mouse_track

    def record_mouse_track(self, event):
        x, y = event.x(), event.y()
        painter = QPainter(self.label.pixmap())
        painter.setPen(QPen(Qt.black, 10, Qt.SolidLine))
        painter.drawPoint(x, y)
        painter.end()
        self.update()

    def clear_canvas(self):
        pixmap = QPixmap(self.label.size())
        pixmap.fill(Qt.white)
        self.label.setPixmap(pixmap)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MyPaint()
    window.show()
    sys.exit(app.exec_())

在PyCharm中打开main.py文件，运行应用程序，开始使用绘画板识别鼠标写的数字！