Get log handle for log that rotates on size.

gistfile1.txt

import logging

def setup_log_size_rotating(log_filename, 
                             logname='defaultlog',
                             max_size_in_bytes=(1024 * 1000000), 
                             debug=False, 
                             backups = 32):
    """ The file will rollover when it approaches maxBytes.
    Our default size is 1MB
    """
    log = logging.getLogger(logname)
    
    lh = logging.handlers.RotatingFileHandler(log_filename,
                                              maxBytes=max_size_in_bytes, 
                                              backupCount=backups,
                                              encoding='utf-8')
    
    if debug:
        log.setLevel(logging.DEBUG)
        lh.setLevel(logging.DEBUG)
    else:
        log.setLevel(logging.INFO)
        lh.setLevel(logging.INFO)
        
    formatter = logging.Formatter('%(asctime)s|%(name)s|%(levelname)s|%(message)s')
    lh.setFormatter(formatter)
    log.addHandler(lh)
    
    return log