Python、Flask同时打印到控制台和日志文件

import logging
from flask import Flask

app = Flask(__name__)

# 创建日志记录器
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

# 创建控制台处理器
console_handler = logging.StreamHandler()
console_handler.setLevel(logging.DEBUG)

# 创建文件处理器
file_handler = logging.FileHandler('app.log')
file_handler.setLevel(logging.INFO)

# 创建日志格式器
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# 将格式器添加到处理器
console_handler.setFormatter(formatter)
file_handler.setFormatter(formatter)

# 将处理器添加到日志记录器
logger.addHandler(console_handler)
logger.addHandler(file_handler)

@app.route('/')
def hello():
    logger.debug('This is a debug message')
    logger.info('This is an info message')
    logger.warning('This is a warning message')
    logger.error('This is an error message')
    return 'Hello, World!'

if __name__ == '__main__':
    app.run()