QLineEdit

更新和获取文本框内容

更新：QLineEdit().setText(text)
获取：QLineEdit().text()

from PyQt5.QtWidgets import *
import sys

app = QApplication(sys.argv)

window = QWidget()
window.resize(200, 200)

lineEdit = QLineEdit(window)
lineEdit.setText('1234')

button1 = QPushButton('更新', window)
button1.clicked.connect(lambda: lineEdit.setText('更新内容'))
button1.move(50, 100)

button2 = QPushButton('获取', window)
button2.clicked.connect(lambda: print(lineEdit.text()))
button2.move(50, 150)

window.show()

sys.exit(app.exec_())

运行结果：

设置为无边框

无边框样式：QLineEdit().setStyleSheet('border: none;')
以以上代码为例：

lineEdit.setStyleSheet('border: none;')

运行结果：