python之列印日誌logging

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 1 import logging 2  3  4 # 簡單列印日誌舉例 5 logging.basicConfig(level=logging.DEBUG)  # 設定記錄層級，WARN 6 logging.warning(‘Watch out!‘)  # will print a message to the console 7 logging.info(‘I told you so‘)  # will not print anything 8  9 10 # 列印日誌到檔案,注意要新起一個檔案，否則不能儲存檔案11 def log_to_file(logs_dir="D:\\test_data\\logs\\log_DEBUG.txt"):12     logging.basicConfig(filename=logs_dir, level=logging.DEBUG)13     logging.debug(‘This message should go to the log file‘)14     logging.info(‘So should this‘)15     logging.warning(‘And this, too‘)16 17 18 log_to_file()19 20 # 多參數日誌21 logging.warning(‘%s before you %s‘, ‘Look‘, ‘leap!‘)22 23 # 日誌中列印時間24 logging.basicConfig(format=‘%(asctime)s %(message)s‘)25 logging.warning(‘is when this event was logged.‘)26 27 # 指定時間格式28 logging.basicConfig(format=‘%(asctime)s %(message)s‘, datefmt=‘%Y-%m-%d %I:%M:%S %p‘)29 logging.warning(‘is when this event was logged.‘)

注意：logging的參數設定只在第一次運行之前有效，只能設定一次，後續設定無效。

指定時間格式運行結果：

1 # 指定時間格式2 2017-08-12 10:47:07 PM is when this event was logged.

 

python之列印日誌logging