2021-09-20 19:35:32 +02:00
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# Time & Datetime
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2021-01-31 11:05:37 +01:00
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## Time
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```py
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# epoch: tempo in secondi trascorso (in UNIX parte da 01-010-1970)
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import time # UNIX time
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variabile = time.time() # restituisce il tempo (In secondi) trascorso da 01-01-1970
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2021-09-20 19:35:32 +02:00
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variabile = time.ctime(epochseconds) # trasforma l'epoca in data
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2021-01-31 11:05:37 +01:00
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var = time.perf_counter() # ritorna il tempo di esecuzione attuale
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# tempo di esecuzione = tempo inizio - tempo fine
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```
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### time.srtfrime() format
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| Format | Data |
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|--------|------------------------------------------------------------------------------------------------------------|
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2021-09-20 19:35:32 +02:00
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| `%a` | Locale's abbreviated weekday name. |
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| `%A` | Locale's full weekday name. |
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| `%b` | Locale's abbreviated month name. |
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| `%B` | Locale's full month name. |
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| `%c` | Locale's appropriate date and time representation. |
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2021-01-31 11:05:37 +01:00
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| `%d` | Day of the month as a decimal number `[01,31]`. |
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| `%H` | Hour (24-hour clock) as a decimal number `[00,23]`. |
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| `%I` | Hour (12-hour clock) as a decimal number `[01,12]`. |
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| `%j` | Day of the year as a decimal number `[001,366]`. |
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| `%m` | Month as a decimal number `[01,12]`. |
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| `%M` | Minute as a decimal number `[00,59]`. |
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2021-09-20 19:35:32 +02:00
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| `%p` | Locale's equivalent of either AM or PM. |
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2021-01-31 11:05:37 +01:00
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| `%S` | Second as a decimal number `[00,61]`. |
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| `%U` | Week number of the year (Sunday as the first day of the week) as a decimal number `[00,53]`. |
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| `%w` | Weekday as a decimal number `[0(Sunday),6]`. |
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| `%W` | Week number of the year (Monday as the first day of the week) as a decimal number `[00,53]`. |
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2021-09-20 19:35:32 +02:00
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| `%x` | Locale's appropriate date representation. |
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| `%X` | Locale's appropriate time representation. |
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2021-01-31 11:05:37 +01:00
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| `%y` | Year without century as a decimal number `[00,99]`. |
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| `%Y` | Year with century as a decimal number. |
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| `%z` | Time zone offset indicating a positive or negative time difference from UTC/GMT of the form +HHMM or -HHMM |
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| `%Z` | Time zone name (no characters if no time zone exists). |
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| `%%` | A literal `%` character. |
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## Datetime
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```py
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import datetime
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today = datetime.date.today() # restituisce data corrente
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today = datetime.datetime.today() # restituisce la data e l'ora corrente
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# esempio di formattazione
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print('Current Date: {}-{}-{}' .format(today.day, today.month, today.year))
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2021-01-31 11:05:37 +01:00
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print('Current Time: {}:{}.{}' .format(today.hour, today.minute, today.second))
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var_1 = datetime.date(anno, mese, giorno) # crea oggetto data
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var_2 = datetime.time(ora, minuti, secondi, micro-secondi) # crea oggetto tempo
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dt = datetime.combine(var_1, var_2) # combina gli oggetti data e tempo in un unico oggetto
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2021-09-20 19:35:32 +02:00
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date_1 = datetime.date('year', 'month', 'day')
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2021-01-31 11:05:37 +01:00
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date_2 = date_1.replace(year = 'new_year')
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#DATETIME ARITHMETIC
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date_1 - date_2 # -> datetime.timedelta(num_of_days)
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datetime.timedelta # durata esprimente differenza tra due oggetti date, time o datetime
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```
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