Calculate the average delay in time?

Question

Python

Good afternoon,
I have a list of datetime :

[datetime.datetime(2021, 12, 20, 16, 54, 56), datetime.datetime(2021, 12, 20, 16, 54, 57), datetime.datetime(2021, 12, 20, 16, 54, 57)]

I want to somehow get the average delay between dates (in seconds).

It would be possible to remove the middle element, and count them already, but this is not accurate.

Answer 1

dates = [datetime.datetime(2021, 12, 20, 16, 54, 56), datetime.datetime(2021, 12, 20, 16, 54, 57), datetime.datetime(2021, 12, 20, 16, 54, 57)]

average = sum(abs(x-y).total_seconds() for x, y in zip(dates, dates[1:])) / (len(dates) - 1)
print(average)

>>> 0.5

Answer 2

from more_itertools import windowed
import datetime
import statistics

dates = [
    datetime.datetime(year=2021, month=12, day=20, hour=16, minute=54, second=56),
    datetime.datetime(year=2021, month=12, day=20, hour=16, minute=54, second=57),
    datetime.datetime(year=2021, month=12, day=20, hour=16, minute=54, second=57),
]


diffs = []

for first, second in windowed(dates, 2):
    diffs.append((second-first).total_seconds())

print(f'Avg: {statistics.mean(diffs)}')

Avg: 0.5

Process finished with exit code 0