Pitone delta temporale() la funzione è presente sotto libreria data/ora che viene generalmente utilizzato per calcolare le differenze nelle date e può anche essere utilizzato per manipolare le date in Python. È uno dei modi più semplici per eseguire manipolazioni della data.
Sintassi: datetime.timedelta(giorni=0, secondi=0, microsecondi=0, millisecondi=0, minuti=0, ore=0, settimane=0)
Ritorna : Data
Codice n. 1:
Python3
tabella ascii java
# 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))> |
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>Produzione:
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>
Codice n. 2:
Python3
# 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))> |
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>Produzione:
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>
Codice n. 3:
Python3
# 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))> |
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Barra degli strumenti di accesso rapido a MS WordProduzione:
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>
Sottrarre un oggetto timedelta da un oggetto date o datetime:
Approccio:
Crea un oggetto timedelta con la differenza oraria desiderata.
Sottrarre l'oggetto timedelta da un oggetto date o datetime utilizzando l'operatore –.
Python3
import> datetime> today>=> datetime.date.today()> three_days_ago>=> today>-> datetime.timedelta(days>=>3>)> print>(>'Today:'>, today)> print>(>'Three days ago:'>, three_days_ago)> |
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>Produzione
Today: 2023-03-24 Three days ago: 2023-03-21>
Complessità temporale : O(1)
Spazio ausiliario: O(1)