如何将表单输入链接到变量PyQt5的问题

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QLineEdit, QVBoxLayout

class MyForm(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('表单输入示例')
        layout = QVBoxLayout()
        self.label = QLabel('请输入内容：')
        self.textbox = QLineEdit()
        layout.addWidget(self.label)
        layout.addWidget(self.textbox)
        self.setLayout(layout)

    def get_input(self):
        input_text = self.textbox.text()
        print('输入内容：', input_text)

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

from PyQt5.QtWidgets import QPushButton

class MyForm(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('表单输入示例')
        layout = QVBoxLayout()
        self.label = QLabel('请输入内容：')
        self.textbox = QLineEdit()
        self.button = QPushButton('获取输入')
        self.button.clicked.connect(self.get_input)  # 连接按钮点击事件与获取输入内容的方法
        layout.addWidget(self.label)
        layout.addWidget(self.textbox)
        layout.addWidget(self.button)
        self.setLayout(layout)

    def get_input(self):
        input_text = self.textbox.text()
        print('输入内容：', input_text)