How to get an integer value from lineEdit? PyQt5

QLineEdit has only .text() , and .toPlainText() is for QTextEdit and QPlainTextEdit .

In addition, if an int(...) is passed, something other than a numeric value, there will be an exception that, if not caught, the application will break:

 from PyQt5.Qt import QLineEdit, QApplication app = QApplication([]) line_edit = QLineEdit('123') value = line_edit.text() print(value) # "123" print(int(value)) # 123 

Ps. To catch an exception in Qt slots, add code:

 def log_uncaught_exceptions(ex_cls, ex, tb): text = '{}: {}:\n'.format(ex_cls.__name__, ex) import traceback text += ''.join(traceback.format_tb(tb)) print(text) QMessageBox.critical(None, 'Error', text) quit() import sys sys.excepthook = log_uncaught_exceptions 

Pps. why do you need QLineEdit ? Maybe it is better to use QSpinBox ? QSpinBox has a .value() method that will return an int

PPPS. I will add an example of checking the string value when converting to a number:

 from PyQt5.Qt import * class Window(QWidget): def __init__(self): super().__init__() self.line_edit = QLineEdit('123') self.button_check = QPushButton('Проверить число!') self.button_check.clicked.connect(self._on_check) layout = QVBoxLayout() layout.addWidget(self.line_edit) layout.addWidget(self.button_check) self.setLayout(layout) def _on_check(self): text = self.line_edit.text() try: value = int(text) QMessageBox.information(self, 'Информация', 'Введено валидное число: "{}"'.format(value)) except ValueError: QMessageBox.warning(self, 'Внимание', 'Введено невалидное число: "{}"'.format(text)) if __name__ == '__main__': app = QApplication([]) mw = Window() mw.show() app.exec()