logging

# logging

import logging

logging.basicConfig(level=logging.INFO)

logging.debug('This message will be ignored')

logging.info('This should be logged')

logging.warning('And this, too')

# 결과

INFO:root:This should be logged

WARNING:root:And this, too

# 상수

print(logging.DEBUG)

print(logging.INFO)

print(logging.WARNING)

# 결과

10

20

30

# 파일 저장

import logging

logging.basicConfig(level=logging.INFO, filename='logs.txt', filemode='w')

logging.debug('This message will be ignored')

logging.info('This should be logged')

logging.warning('And this, too')

import logging

logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')

# logging.disable(logging.CRITICAL)

def buggy_factorial(n):

logging.debug('Start of factorial (%s)' % (n))

total = 1

for i in range(n+1):

total *= i

logging.debug('i is %s, total is %s' % (i, total))

logging.debug('Return value is %s' % (total))

return total

print(buggy_factorial(5))

# 결과

2016-06-10 15:32:53,441 - DEBUG - Start of factorial (5)

2016-06-10 15:32:53,441 - DEBUG - i is 0, total is 0

2016-06-10 15:32:53,441 - DEBUG - i is 1, total is 0

2016-06-10 15:32:53,441 - DEBUG - i is 2, total is 0

2016-06-10 15:32:53,441 - DEBUG - i is 3, total is 0

2016-06-10 15:32:53,441 - DEBUG - i is 4, total is 0

2016-06-10 15:32:53,441 - DEBUG - i is 5, total is 0

2016-06-10 15:32:53,441 - DEBUG - Return value is 0

0