#```py
rugged kiln
so back to the original question, how to get epoch from a ISO string (with CPY)? what im trying to do is fetching Adafruit IO data and display it on a pyportal. i read the last feed data for the ISO string, and i want to reload the display 10 minutes after the last data was published (rather than 10 minutes after reset on the pyportal) but it seems like a trivial and common use, but my fundamentals fail me..
mktime works..
i just need to make a time tuple from the string, without strptime?
devout hull
that would give you the time since the date in the string
d = datetime.fromisoformat('2000-01-01T00:30:27')
now = datetime.now()
delta = (now - d).total_seconds()
in seconds
you add that to time.monotonic() or time.time()
devout hull
with from adafruit_datetime import datetime as above
rugged kiln
aha:
ImportError: no module named 'datetime'
how do i do the add code thingy here?
rugged kiln
import adafruit_datetime
d = datetime.fromisoformat('2000-01-01T00:30:27')
now = datetime.now()
delta = (now - d).total_seconds()
NameError: name 'datetime' is not defined
devout hull
from adafruit_datetime import datetime
d = datetime.fromisoformat('2000-01-01T00:30:27')
now = datetime.now()
delta = (now - d).total_seconds()
that's a channel on discord, click on it !
devout hull
from adafruit_datetime import datetime
rugged kiln
code.py output:
Traceback (most recent call last):
File "code.py", line 3, in <module>
NameError: name 'datetime' is not defined
is this a python thing im missing?
but shouldnt adafruit_datetime be able to solve my original problem?
oops
missed the import...
Works!
ok, so this is the lesson to be learned is i dont knwo the difference btw
from adafruit_datetime import datetime
and
import adafruit_datetime
```
i thought it included everything thengreat, you attacked the original problem too. gonna try it now. but for principles sake:
how to get the epoch time?
devout hull
well if you want to know if was 10 minutes from the last time you don't need that, you have the delta here, provided you setup the time on the board using NTP, depending on which board it is
a datetime object has a timestamp property
we usually measure relative time with the time.monotonic() function which gives a time in seconds since boot (it loses precision after many hours because it's a float, but for measuring minutes it's fine), or time.monotonic_ns() which is an int (no loss of precision)
when you setup the time, you have time.time() which gives you the epoch as an int
rugged kiln
yep. well the data on adafruit io is not updated aat boot time intervals 🙂 so one has to immidiately check what the last timestamp was to sync it. thats what im trying to do.. and time.time()gave me epoch, and AIO gave me the string, so thats a quite common issues i should say
rugged kiln
thanks a bunch @devout hull! been sitting for hours now..