Python timedelta() la funció està present sota biblioteca datetime que s'utilitza generalment per calcular diferències de dates i també es pot utilitzar per a manipulacions de dates a Python. És una de les maneres més fàcils de realitzar manipulacions de dates.
Sintaxi: datetime.timedelta(dies=0, segons=0, microsegons=0, mil·lisegons=0, minuts=0, hores=0, setmanes=0)
Devolucions: Data
Codi #1:
afegir a la matriu java
Python 3
# Timedelta function demonstration> from> datetime>import> datetime, timedelta> # Using current time> ini_time_for_now>=> datetime.now()> # printing initial_date> print> ('initial_date',>str>(ini_time_for_now))> # Calculating future dates> # for two years> future_date_after_2yrs>=> ini_time_for_now>+> > >timedelta(days>=> 730>)> future_date_after_2days>=> ini_time_for_now>+> > >timedelta(days>=> 2>)> # printing calculated future_dates> print>(>'future_date_after_2yrs:'>,>str>(future_date_after_2yrs))> print>(>'future_date_after_2days:'>,>str>(future_date_after_2days))> |
>
>Sortida:
initial_date 2019-02-27 12:41:45.018389 future_date_after_2yrs: 2021-02-26 12:41:45.018389 future_date_after_2days: 2019-03-01 12:41:45.018389>
Codi #2:
Python 3
# Timedelta function demonstration> from> datetime>import> datetime, timedelta> # Using current time> ini_time_for_now>=> datetime.now()> # printing initial_date> print> (>'initial_date:'>,>str>(ini_time_for_now))> # Calculating past dates> # for two years> past_date_before_2yrs>=> ini_time_for_now>-> > >timedelta(days>=> 730>)> # for two hours> past_date_before_2hours>=> ini_time_for_now>-> > >timedelta(hours>=> 2>)> # printing calculated past_dates> print>(>'past_date_before_2yrs:'>,>str>(past_date_before_2yrs))> print>(>'past_date_before_2hours:'>,>str>(past_date_before_2hours))> |
>
>Sortida:
initial_date 2019-02-27 12:41:46.104662 past_date_before_2yrs: 2017-02-27 12:41:46.104662 past_date_after_2days: 2019-02-27 10:41:46.104662>
Codi #3:
Python 3
conjunt c++
# Timedelta function demonstration> from> datetime>import> datetime, timedelta> # Using current time> ini_time_for_now>=> datetime.now()> # printing initial_date> print> ('initial_date',>str>(ini_time_for_now))> # Some another datetime> new_final_time>=> ini_time_for_now>+> > >timedelta(days>=> 2>)> # printing new final_date> print> ('new_final_time',>str>(new_final_time))> # printing calculated past_dates> print>(>'Time difference:'>,>str>(new_final_time>-> > >ini_time_for_now))> |
>
>Sortida:
initial_date 2019-02-27 12:41:47.386595 new_final_time 2019-03-01 12:41:47.386595 Time difference: 2 days, 0:00:00>
Restant un objecte timedelta d'un objecte data o datetime:
Enfocament:
Creeu un objecte timedelta amb la diferència horària desitjada.
Resta l'objecte timedelta d'un objecte data o datatime mitjançant l'operador –.
Python 3
import> datetime> today>=> datetime.date.today()> three_days_ago>=> today>-> datetime.timedelta(days>=>3>)> print>(>'Today:'>, today)> print>(>'Three days ago:'>, three_days_ago)> |
forma normal de greibach
>
>Sortida
Today: 2023-03-24 Three days ago: 2023-03-21>
Complexitat temporal : O(1)
Espai auxiliar: O(1)