how to calculate date difference in micropython

[Guru]

Hi
I have 2 dates and i wish to calculate the difference between the dates, with the result being shown in days. could anyone show me the way, using utime.

thanks.

[kfricke]

Check time.localtime([secs]) from the docs. Using that you will receive an 8-tuple. Do some calculating for your desired representation.

[pythoncoder]

A calculation which would be fairly involved given the different lengths of months and the effect of leap years.

I would use utime.mktime() and integer division to do this. utime.mktime() converts a date tuple to a number of seconds since the epoch.

Code: Select all

import utime
def days_between(d1, d2):
    d1 += (1, 0, 0, 0, 0)  # ensure a time past midnight
    d2 += (1, 0, 0, 0, 0)
    return utime.mktime(d1) // (24*3600) - utime.mktime(d2) // (24*3600)

date1 = (2017, 12, 25)
date2 = (2017, 12, 4)
print(days_between(date1, date2))