【PyQt5】logging封装+pyqt5展示系统日志

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logging封装

创建logging对象
设置日志输出级别
指定日志输出格式
指定日志输出路径
指定日志输出文件
控制台输出
文件输出

7.1 指定FileHandler
7.2 设置日志输出格式
7.3 设置过滤条件
7.4 将文件输出日志添加过滤条件
7.5 对logger增加handler日志处理器

import logging
import os
import time
from pathlib import Path


class Logger:
    def __init__(self):
        self.logger = logging.getLogger()

        _level = "INFO"

        try:
            self.logger.setLevel(_level.upper())
        except ValueError:
            self.logger.setLevel(logging.INFO)

        # 指定日志输出格式
        self.formatter = logging.Formatter(
            "%(asctime)s - [%(filename)s] -[%(funcName)s:%(lineno)s] - %(levelname)s : %(message)s"
        )

        # 指定日志输出路径
        self.log_path = "C:/tmp/log/"
        if not Path(self.log_path).is_dir():
            os.makedirs(self.log_path)

        # 指定日志输出文件
        _rq = time.strftime("%Y%m%d%H%M%S", time.localtime(time.time()))
        self.log_info_file = self.log_path + _rq + '.log'

        # 控制台输出
        self.set_console_logger()
        # 文件输出
        self.set_file_logger()

    def set_file_logger(self):
        """
        将日志输出到文件
        :return:
        """
        log_handler_info = logging.FileHandler(self.log_info_file, mode='w', encoding='utf-8')
        # 设置日志输出格式
        log_handler_info.setFormatter(self.formatter)
        # 设置过滤条件
        info_filter = logging.Filter()
        info_filter.filter = lambda record: record.levelno >= logging.INFO
        # 将文件输出日志添加过滤条件
        log_handler_info.addFilter(info_filter)
        # 对logger增加handler日志处理器
        self.logger.addHandler(log_handler_info)

    def set_console_logger(self):
        """
        将日志输出到控制台
        """
        _ch = logging.StreamHandler()
        _ch.setLevel(logging.INFO)
        _ch.setFormatter(self.formatter)
        self.logger.addHandler(_ch)

    def get_logger(self):
        return self.logger


logger = Logger().get_logger()

Qt designer绘制UI界面

1.cmd中输入命令，将.ui转换成.py

pyuic5 -o system_log.py system_log.ui

2.重新封装QPlainTextEdit

system_log.py

import logging
from PyQt5 import QtCore, QtGui, QtWidgets

from logger import logger


class QTextEditLogger(logging.Handler):
    def __int__(self, parent):
        super().__init__()
        self.widget = QtWidgets.QPlainTextEdit(parent)
        self.widget.setReadOnly(True)

    def emit(self, record):
        msg = self.format(record)
        self.widget.appendPlainText(msg)


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(399, 335)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.centralwidget)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setObjectName("widget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)
        self.verticalLayout.setObjectName("verticalLayout")

        # self.plainTextEdit = QtWidgets.QPlainTextEdit(self.widget)
        # self.plainTextEdit.setObjectName("plainTextEdit")
        # self.verticalLayout.addWidget(self.plainTextEdit)

        self.logTextBox = QTextEditLogger(self.widget)
        logger.addHandler(self.logTextBox)
        logger.setLevel(logging.INFO)
        self.verticalLayout.addWidget(self.logTextBox.widget)

        self.pushButton = QtWidgets.QPushButton(self.widget)
        self.pushButton.setObjectName("pushButton")
        self.verticalLayout.addWidget(self.pushButton)
        self.horizontalLayout.addWidget(self.widget)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 399, 23))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "开始"))

编写启动脚本

将UI和实现逻辑分开

operate.py

import datetime
import time

from logger import logger


def print_logger():
    for _ in range(100):
        logger.info(datetime.datetime.now())
        time.sleep(0.5)


def print_logger2():
    for index in range(100):
        logger.info(index)
        time.sleep(0.3)

tools.py文章来源地址https://www.toymoban.com/news/detail-460804.html

import sys
import threading

import operate
from system_log import Ui_MainWindow
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QMainWindow


class LoggerWin(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.listener()

    def listener(self):
        # 开始
        self.pushButton.clicked.connect(self.working)

    def working(self):
        # 需要添加多线程才可以实现，实时展示系统日志，否则需要等到后台的方法执行完毕才会把所有的日志全部展示出来
        # operate.print_logger()
        t1 = threading.Thread(target=operate.print_logger)
        t2 = threading.Thread(target=operate.print_logger2)
        t1.daemon = True
        t1.start()
        t2.start()


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    log_win = LoggerWin()
    log_win.show()
    log_win.raise_()
    sys.exit(app.exec_())