pyqt5鼠标在图片中绘画代码怎么写

你好，关于你的问题，以下是一段Python代码，可以实现在PyQt5中用鼠标在图片中绘画：

from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel
from PyQt5.QtGui import QPixmap, QPainter, QPen
from PyQt5.QtCore import Qt, QPoint
 
class MyLabel(QLabel):
 
    def __init__(self, parent=None):
        super(MyLabel, self).__init__(parent)
        self.setPixmap(QPixmap("your_image_path")) # 请将 your_image_path 替换为你的图片路径
        self.pos_xy = []
 
    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.pos_xy.append((event.pos().x(), event.pos().y()))
 
    def mouseReleaseEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.pos_xy = []
 
    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawPixmap(self.rect(), self.pixmap())
        painter.setPen(QPen(Qt.red, 5, Qt.SolidLine))
        for pos in self.pos_xy:
            painter.drawPoint(QPoint(*pos))
 
if __name__ == '__main__':
    app = QApplication([])
    window = QMainWindow()
    label = MyLabel(window)
    window.setCentralWidget(label)
    window.show()
    app.exec_()

希望能帮到你！