from PySide6.QtWidgets import QApplication, QWidget, QMainWindow, QPushButton, QLabel, QLineEdit, QHBoxLayout, \
    QVBoxLayout, QTextEdit
import sys

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

        self.setWindowTitle('my App')
        self.setMinimumSize(400,300)

        self.input=QTextEdit()

        self.button = QPushButton('Submit')
        self.button.connect(self.testSubmit)

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


        container=QWidget()
        container.setLayout(layout)

        self.setCentralWidget(container)

    def testSubmit(self):
        values = self.input.toPlainText()
        print(values)

app = QApplication(sys.argv)

window = MainWindow()
window.show()

app.exec()