1 import logging
2
3
4 # 簡單打印日志舉例
5 logging.basicConfig(level=logging.DEBUG) # 設置日志級別，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 # 打印日志到文件,注意要新起一個文件，否則不能保存文件
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 # 多參數日志
21 logging.warning('%s before you %s', 'Look', 'leap!')
22
23 # 日志中打印時間
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的參數設置只在第一次運行之前有效，只能設置一次，后續設置無效。
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.
