Python Calculation program run time

Method 1

Import= datetime.datetime.now ()#long running=  Datetime.datetime.now ()print (endtime-starttime). seconds

Method 2

Start == time.time ()print End-start

Method 3

Start == time.clock ()print End-start

Both Method 1 and Method 2 contain the time that other programs use the CPU, which is the time the program starts to run to the end of the program.

Method 3 calculates only the CPU time that the program is running

Python Calculation program run time