2.3 time and dateandtime

Important

This lesson is still under development.

time

import time

time()

time.time()

1731311822.0541122

start = time.time()

# do something

print(time.time() - start, "seconds")

7.486343383789062e-05 seconds

sleep()

for i in range(5):
    time.sleep(0.5)
    print(i, end = " ")

0 1 2 3 4

asctime()

from time import asctime
asctime()

'Mon Nov 11 07:57:04 2024'

clock()

daylight

localtime()

print(time.localtime())

time.struct_time(tm_year=2024, tm_mon=11, tm_mday=11, tm_hour=7, tm_min=57, tm_sec=4, tm_wday=0, tm_yday=316, tm_isdst=0)

timezone

ctime()

print(time.ctime())

Mon Nov 11 07:57:04 2024

datetime

from datetime import datetime

datetime.now()

now = datetime.now()

print(now)

2024-11-11 07:57:04.559395

print(type(now))

<class 'datetime.datetime'>

datetime.ctime()

datetime.ctime(now)

'Mon Nov 11 07:57:04 2024'

datetime.strftime()

print(datetime.strftime(now, "%Y-%m-%d %H:%M:%S"))

2024-11-11 07:57:04

datetime.strptime()

datetime.isoformat()

datetime.isoformat(now)

'2024-11-11T07:57:04.559395'

datetime.isoformat(now, sep=" ")

'2024-11-11 07:57:04.559395'

datetime.fromisoformat()

datetime.toordinal()

datetime.fromtimestamp()

timedelta

from datetime import timedelta

current = datetime.now()

current + timedelta(seconds=10)

datetime.datetime(2024, 11, 11, 7, 57, 14, 561237)

current + timedelta(days=10)

datetime.datetime(2024, 11, 21, 7, 57, 4, 561237)

current + timedelta(weeks=10)

datetime.datetime(2025, 1, 20, 7, 57, 4, 561237)

current - timedelta(hours=10)

datetime.datetime(2024, 11, 10, 21, 57, 4, 561237)

We can compare two datetime objects

past = current - timedelta(hours=10)

current > past

True

current < past

False

future = current + timedelta(hours=10)

current < future

True

current > future

False

strftime()

now.strftime("%Y%m%d_%H%M%S")

'20241111_075704'

now.strftime("%d %B %Y %H:%M:%S")

'11 November 2024 07:57:04'