{{tag>Python Date CA}}

= Notes Python - date - datetime

== AM/PM

| AM | ante meridiem |
| PM | post meridiem |

<code python>
import datetime
#from datetime import datetime
format_date='%Y-%m-%d %I:%M %p'

date1=datetime.datetime(2023, 9, 25, 11, 59, 0, 0)
date2=datetime.datetime(2023, 9, 25, 12, 0, 0, 0)
date3=datetime.datetime(2023, 9, 25, 12, 1, 0, 0)
</code>

<code ->
In [32]: datetime.datetime.strftime(date1, format_date)
Out[32]: '2023-09-25 11:59 AM'

In [33]: datetime.datetime.strftime(date2, format_date)
Out[33]: '2023-09-25 12:00 PM'

In [34]: datetime.datetime.strftime(date3, format_date)
Out[34]: '2023-09-25 12:01 PM'
</code>

== TimeZone (TZ)

<code python>
datetime.datetime(2023, 9, 25, 10, 0, 34, 441838, tzinfo=<UTC>)
</code>


<code python>
import datetime
from dateutil import tz

TZ_PARIS=tz.gettz('Europe/Paris')
TZ_UTC=tz.gettz('UTC')

d_utc=datetime.datetime(2023, 10, 3, 1, 1, 1, 114228, tzinfo=TZ_UTC)
d_paris=datetime.datetime(2023, 10, 3, 1, 1, 1, 114228, tzinfo=TZ_PARIS)
</code>

<code ->
In [4]: d_utc.isoformat(timespec='minutes')
Out[4]: '2023-10-03T01:01+00:00'

In [5]: d_paris.isoformat(timespec='minutes')
Out[5]: '2023-10-03T01:01+02:00'
</code>


== Epoch time

<code python>
def get_epoch_ms():
    return int(time.time() * 1000.0)
</code>

== Temps

=== Mesure du temps d'exécution

Exemple 1
<code python>
print(f"started at {time.strftime('%X')}")
plop()
print(f"finished at {time.strftime('%X')}")
</code>


Exemple 2
<code python>
start = time.time()
asyncio.run(main())
end = time.time() - start
print('Total time: %.2f' % end)
</code>