pyqt5实时显示输出

可以使用 QTextEdit 来实现实时显示输出。下面是一个简单的例子：

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QTextEdit, QPushButton
from PyQt5.QtCore import QThread, pyqtSignal

class WorkerThread(QThread):
    output_signal = pyqtSignal(str)

    def __init__(self):
        super().__init__()

    def run(self):
        for i in range(10):
            output = f'Output {i}\n'
            self.output_signal.emit(output)
            self.sleep(1)

class MainWindow(QWidget):
    def __init__(self):
        super().__init__()

        self.output_text_edit = QTextEdit(self)
        self.output_text_edit.setReadOnly(True)

        self.start_button = QPushButton('Start', self)
        self.start_button.clicked.connect(self.start_worker_thread)

        layout = QVBoxLayout(self)
        layout.addWidget(self.output_text_edit)
        layout.addWidget(self.start_button)

    def start_worker_thread(self):
        self.start_button.setEnabled(False)

        self.worker_thread = WorkerThread()
        self.worker_thread.output_signal.connect(self.append_output_text)
        self.worker_thread.finished.connect(self.worker_thread_finished)
        self.worker_thread.start()

    def append_output_text(self, text):
        self.output_text_edit.moveCursor(self.output_text_edit.End)
        self.output_text_edit.insertPlainText(text)

    def worker_thread_finished(self):
        self.start_button.setEnabled(True)

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

这个例子中，我们使用了两个线程：主线程和工作线程。工作线程每隔一秒钟输出一条消息，然后通过 `output_signal` 信号将消息发送给主线程。主线程收到消息后调用 `append_output_text()` 方法将消息追加到 QTextEdit 控件中，实现实时显示输出。