如何通过PyQt5按钮点击触发Python脚本执行？

Hey there! Let's get those buttons to run your target scripts when clicked. Using Python's subprocess module (ideal for spawning external processes) and extending your existing code, here's a straightforward solution:

Complete Modified Code #

import sys
import subprocess
from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplication

class AutoTestWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        btn1 = QPushButton("Test № 1 ", self)
        btn1.move(30, 50)
        btn2 = QPushButton("Test № 2", self)
        btn2.move(150, 50)

        btn1.clicked.connect(self.buttonClicked)
        btn2.clicked.connect(self.buttonClicked)

        self.statusBar()
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Script Runner')
        self.show()

    def buttonClicked(self):
        # Get the button that triggered the click event
        sender_button = self.sender()
        
        # Map button text to corresponding script paths
        if sender_button.text() == "Test № 1 ":
            self.run_script("path/to/your/test_script_1.py")
        elif sender_button.text() == "Test № 2":
            self.run_script("path/to/your/test_script_2.py")

    def run_script(self, script_path):
        try:
            # Use the current Python interpreter to run the script
            # Capture output to show feedback in the status bar
            run_result = subprocess.run(
                [sys.executable, script_path],
                capture_output=True,
                text=True,
                check=True
            )
            # Show success feedback (truncate long output for readability)
            self.statusBar().showMessage(f"Success! Output: {run_result.stdout[:50]}...")
        except subprocess.CalledProcessError as err:
            # Show error if script exits with non-zero code
            self.statusBar().showMessage(f"Script failed: {err.stderr[:50]}...")
        except FileNotFoundError:
            # Handle missing script file
            self.statusBar().showMessage("Error: Script file not found!")

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

Key Details Explained #

• subprocess.run(): This is the recommended way to run external commands in Python 3.5+. Using sys.executable ensures we use the same Python interpreter that's running your PyQt app, avoiding environment mismatch issues.
• self.sender(): This method lets us identify which button was clicked, so we can map each button to its specific script.
• Status Bar Feedback: The status bar gives immediate visual feedback about whether the script ran successfully, failed, or was missing.
• Error Handling: We catch common issues like missing files and script runtime errors to make the app more robust.

Bonus: For Long-Running Scripts #

If your scripts take time to execute, use subprocess.Popen instead of subprocess.run() to avoid freezing the UI:

def run_script(self, script_path):
    try:
        # Run script in the background without blocking the UI
        subprocess.Popen(
            [sys.executable, script_path],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            text=True
        )
        self.statusBar().showMessage("Script started in background!")
    except FileNotFoundError:
        self.statusBar().showMessage("Error: Script file not found!")

内容的提问来源于stack exchange，提问作者Alex Nikitin