PyQt5 打开新窗口并执行命令示例代码

以下是一个示例代码，其中包含一个主窗口和一个在点击按钮时打开的新窗口。新窗口包含一个文本框和一个按钮，按下按钮后会执行一个命令并将输出显示在文本框中。

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QVBoxLayout, QHBoxLayout, QTextEdit, QPushButton
import subprocess

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('Main Window')
        self.setGeometry(100, 100, 500, 500)

        # Create a button to open the new window
        btn = QPushButton('Open New Window', self)
        btn.clicked.connect(self.open_new_window)

    def open_new_window(self):
        # Create a new window
        new_window = QWidget()
        new_window.setWindowTitle('New Window')
        new_window.setGeometry(200, 200, 300, 300)

        # Create a layout for the new window
        layout = QVBoxLayout()

        # Create a text edit widget
        text_edit = QTextEdit()
        layout.addWidget(text_edit)

        # Create a button to execute a command
        btn = QPushButton('Execute Command', new_window)
        btn.clicked.connect(lambda: self.execute_command(text_edit))

        layout.addWidget(btn)
        new_window.setLayout(layout)

        # Show the new window
        new_window.show()

    def execute_command(self, text_edit):
        # Example command to execute
        command = 'ls -l'

        # Execute the command and capture the output
        output = ''
        try:
            output = subprocess.check_output(command, shell=True)
        except subprocess.CalledProcessError as e:
            output = str(e.output)

        # Display the output in the text edit widget
        text_edit.setText(output.decode('utf-8'))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_window = MainWindow()
    main_window.show()
    sys.exit(app.exec_())

请注意，此示例代码仅用于演示目的。在实际使用中，您需要仔细考虑安全性和异常处理，并仅执行您信任的命令。