how to make a log fiunction code example

Example 1: log2 in python

math.log2(x) 	#x is a number

Example 2: setup logrotate

# Specify the dir that you would like to rotate in the first line.
# You can use daily, weekly or monthly rotation
# On 'rotate' section you can define how many days the log will be kept.

/home/ubuntu/log_dir/* {
    daily
    rotate 7
    size 100M
    compress    
    dateext
    dateformat -%d%m%Y
}