from sys import exit, argv

from PySide6.QtWidgets import (
    QApplication, QMainWindow, 
    QTextEdit, QPlainTextEdit,
)

class MinimalTestWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Teste Mínimo")
        self.plain_text_edit = QTextEdit(self) #QPlainTextEdit(self)
        self.setCentralWidget(self.plain_text_edit)
        self.setGeometry(300, 300, 400, 300)
        
def main():
    app = QApplication(argv)
    w = MinimalTestWindow()
    w.show()
    exit(app.exec())


if __name__ == "__main__":
    main()