An easy way to view the time taken in Python and a smarter way to improve it

I use it a lot but forget it so I output it to remember I intend to write it easily for beginners

For busy people

We have published a decorator on Github that displays the processing time of the function. ** Just install with pip, import and add a decorator to the function you want to measure the processing time! ** ** Please use it

Main subject: Easy (but unfortunate?) Method

Use Python standard time.time () time.time () returns the current UNIX time as a floating point number, so you can take the difference between the time before and after processing.

main.py

import time

start = time.time() #Record start time
"""

Write the process you want to measure the time

"""
end = time.time() #Record the end time
proc_time = end - start #Calculate processing time

print(f"process took {proc_time} seconds") #Show processing time

Just this

• ** It is necessary to rewrite multiple lines of code every time measurement is necessary / unnecessary **
• ** As the number of processes you want to measure increases, the time and effort for code rewriting increases proportionally **

A little disappointing?

Smart improvements with decorators

Make the code above smarter by recreating it into a decorator that measures the processing time of the function

mytools.py

import time
from functools import wraps

def fntime(fn) :
    @wraps(fn)
    def wrapper(*args, **kwargs) :
        start = time.time()
        result = fn(*args, **kwargs)
        end = time.time()
        proc_time = end - start
        print(f"function:{fn.__name__} took {proc_time} seconds")
        return result
    return wrapper

(´-`) .. oO (I'm not going to do it now, but I'd like to explain the decorator someday ...)

main.py

from mytools import fntime

@fntime
def my_process() :
    """
Processing you want to measure
↓ Processing example
    """
    sum = 0
    for i in range(100000000) :
        sum += i

my_process() #Execute the process you want to measure

If you put these two files in the same directory and run main.py

Terminal

$ python main.py
function:my_process took 6.954758167266846 seconds

It will be displayed like this Beautiful. Great. cute. Like.

However, this still has some unfortunate drawbacks. If you try to use @ fntime in another directory, you have to copy and pastemytools.py to that directory.

So I published the code on Github so that I don't have to do that. Just install it with pip, import it and add @fntime to the function! The nice thing about Python is that you can easily avoid reinventing the wheel. Please use it (´-`) .. oO (The Github code is a little easier to see, such as coloring the function name and time, and arranging them vertically.)

Please also follow twitter! Do you usually have a lot of machine learning or Python tweets? As a fledgling engineer, there are many basic posts

I will be posting more and more qiita from now on! I want to make more simple tools like this

Give me LGTM!