用pyqt5写一个实现点击lineedit弹出osk.exe虚拟键盘，点击其他部分隐藏键盘的程序

可以使用以下代码实现：

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLineEdit
from PyQt5.QtCore import QProcess

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

    def initUI(self):
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Virtual Keyboard')

        self.lineEdit = QLineEdit(self)
        self.lineEdit.setGeometry(50, 50, 200, 30)
        self.lineEdit.setPlaceholderText('Click here to show virtual keyboard')
        self.lineEdit.setFocus()

        self.process = QProcess(self)

        self.show()

    def showKeyboard(self):
        self.process.start('osk.exe')

    def hideKeyboard(self):
        self.process.kill()

    def mousePressEvent(self, event):
        self.hideKeyboard()

    def focusOutEvent(self, event):
        self.hideKeyboard()

    def keyPressEvent(self, event):
        if event.key() == Qt.Key_Return:
            self.hideKeyboard()

        super().keyPressEvent(event)

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.showKeyboard()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyWidget()
    sys.exit(app.exec_())

当用户点击 `QLineEdit` 时，会弹出虚拟键盘。当用户点击其他部分或按下回车键时，虚拟键盘会隐藏。