How to Customize the time format for Python logging

Question

I am new to Python s logging package and plan to use it for my project  I would like to customize the time format to my taste  Here is a short code I copied from a tutorial   import logging    create logger logger   logging getLogger  logging tryout2   logger setLevel logging DEBUG     create console handler and set level to debug ch   logging StreamHandler   ch setLevel logging DEBUG     create formatter formatter   logging Formatter    asctime s   levelname s   message s      add formatter to ch ch setFormatter formatter     add ch to logger logger addHandler ch      application  code logger debug  debug message   logger info  info message   logger warn  warn message   logger error  error message   logger critical  critical message     And here is the output   2010-07-10 10 46 28 811 DEBUG debug message 2010-07-10 10 46 28 812 INFO info message 2010-07-10 10 46 28 812 WARNING warn message 2010-07-10 10 46 28 812 ERROR error message 2010-07-10 10 46 28 813 CRITICAL critical message   I would like to shorten the time format to just   2010-07-10 10 46 28   dropping the mili-second suffix  I looked at the Formatter formatTime  but confused  I appreciate your help to achieve my goal  Thank you

User · Answer

if using logging config fileConfig with a configuration file use something like    formatter simpleFormatter  format   asctime s -   name s -   levelname s -   message s datefmt  Y- m- d  H  M  S

User · Answer

From the official documentation regarding the Formatter class      The constructor takes two optional arguments  a message format string and a date format string    So change    create formatter formatter   logging Formatter    asctime s   levelname s   message s     to    create formatter formatter   logging Formatter    asctime s   levelname s   message s                                   Y- m- d  H  M  S

User · Answer

Using logging basicConfig  the following example works for me   logging basicConfig      filename  HISTORYlistener log       level logging DEBUG      format    asctime s   msecs 03d   levelname s   module s -   funcName s    message s       datefmt   Y- m- d  H  M  S       This allows you to format  amp  config all in one line  A resulting log record looks as follows   2014-05-26 12 22 52 376 CRITICAL historylistener - main  History log failed to start

User · Answer

To add to the other answers  here are the variable list from Python Documentation   Directive   Meaning Notes   a  Locale   s abbreviated weekday name      A  Locale   s full weekday name     b  Locale   s abbreviated month name        B  Locale   s full month name       c  Locale   s appropriate date and time representation      d  Day of the month as a decimal number  01 31        H  Hour  24-hour clock  as a decimal number  00 23        I  Hour  12-hour clock  as a decimal number  01 12        j  Day of the year as a decimal number  001 366       m  Month as a decimal number  01 12       M  Minute as a decimal number  00 59      p  Locale   s equivalent of either AM or PM   1   S  Second as a decimal number  00 61    2   U  Week number of the year  Sunday as the first day of the week  as a decimal number  00 53   All days in a new year preceding the first Sunday are considered to be in week 0      3   w  Weekday as a decimal number  0 Sunday  6       W  Week number of the year  Monday as the first day of the week  as a decimal number  00 53   All days in a new year preceding the first Monday are considered to be in week 0      3   x  Locale   s appropriate date representation       X  Locale   s appropriate time representation       y  Year without century as a decimal number  00 99        Y  Year with century as a decimal number      z  Time zone offset indicating a positive or negative time difference from UTC GMT of the form  HHMM or -HHMM  where H represents decimal hour digits and M represents decimal minute digits  -23 59   23 59      Z  Time zone name  no characters if no time zone exists          A literal     character

[python] How to Customize the time format for Python logging?

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