python在pyqt5+logging+threading模块实时显示日志代码示例

import logging
from PyQt5.QtWidgets import QTextBrowser

# 设置全局的日志记录格式和日志等级
logging.basicConfig(format="%(asctime)s %(name)s %(levelname)s %(message)s", level=logging.INFO)


class QTextBrowerHandler(logging.Handler):
    """
    接收一个接数text_browser，他是一个pyqt5的QTextBrowser控件，特征是不可编辑的文本框，适合用来记录日志
    """

    def __init__(self, text_browser: QTextBrowser):
        super().__init__()
        self.text_browser = text_browser

        # 给此handler定义日志的格式
        formatter = logging.Formatter("%(asctime)s %(levelname)s %(message)s")
        self.setFormatter(formatter)

    def emit(self, record):
        """日志处理函数，格式化日志数据后，写入到QTextBrower控件中"""
        msg = self.format(record)
        self.text_browser.append(msg)

# 创建一个logger实例，其他模块引用该实例来记录日志
logger = logging.getLogger()

from PyQt5.QtWidgets import QWidget, QTextBrowser, QFrame, QGridLayout, QLabel, QPushButton, QApplication
import time, sys
from logging_handler import logger, QTextBrowerHandler
import threading

class MyTest(QWidget):

    def __init__(self):
        super(MyTest, self).__init__()
        self.initUI()
        self.setWindowTitle('devops_it')
        self.setGeometry(300, 100, 800, 800)
        self.show()

    def initUI(self):
        self.page_frame = QFrame(self)
        self.grid = grid = QGridLayout(self.page_frame)
        self.setLayout(grid)

        # 配置各个控件，布局页面
        log_label = QLabel('日志记录')
        log_edit = QTextBrowser()
        log_bt = QPushButton('程序启动')
        log_bt.clicked.connect(self.log_print)

        # 将自定义的handler绑定QTextBrowser控件实例后，再绑定到logger实例上
        handler = QTextBrowerHandler(log_edit)
        logger.addHandler(handler)

        grid.addWidget(log_label, 0, 0)
        grid.addWidget(log_bt, 0, 1)
        grid.addWidget(log_edit, 1, 0)

    def log_print(self):
        """按钮触发的函数"""
        def func():
            for i in range(10):
                logger.info('我正在打印日志%s'%i)
                logger.info('我等待一秒')
                time.sleep(1)

        # 创建子线程，主线程不阻塞同步执行指定函数
        added_thread = threading.Thread(target=func)
        added_thread.start()

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