pyqt+python实现图片裁切

from PyQt5.QtWidgets import QApplication, QLabel, QMainWindow, QVBoxLayout, QWidget, QPushButton, QFileDialog
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt
import sys

class ImageCropper(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle('Image Cropper')
        self.setGeometry(100, 100, 400, 300)

        self.label = QLabel(self)
        self.label.setAlignment(Qt.AlignCenter)

        self.button = QPushButton('Select Image', self)
        self.button.clicked.connect(self.select_image)

        layout = QVBoxLayout()
        layout.addWidget(self.label)
        layout.addWidget(self.button)

        widget = QWidget()
        widget.setLayout(layout)

        self.setCentralWidget(widget)

    def select_image(self):
        file_path, _ = QFileDialog.getOpenFileName(self, 'Open Image', '', 'Image Files (*.jpg *.png *.jpeg)')
        pixmap = QPixmap(file_path)
        self.label.setPixmap(pixmap.scaled(300, 300, Qt.KeepAspectRatio))

if __name__ == "__main__":
    app = QApplication(sys.argv)
    cropper = ImageCropper()
    cropper.show()
    sys.exit(app.exec_())