1 Getting Started
1.1 Getting the current time
import datetime datetime_object = () print(datetime_object)
exports
2022-03-29 16:36:44.749582
Process finished with exit code 0
1.2 Getting the current date
import datetime date_object = () print(date_object)
exports
2022-03-29
Process finished with exit code 0
1.3 Classes in datetime
import datetime print(dir(datetime))
exports
['MAXYEAR', 'MINYEAR', '__all__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'date', 'datetime', 'datetime_CAPI', 'sys', 'time', 'timedelta', 'timezone', 'tzinfo']
Process finished with exit code 0
2 Common classes in datetime
- date class
- time class
- datetime class
- timedelta class
2.1 Date class
(1) Example of a date object
import datetime d = (2022, 3, 29) print(d)
exports
2022-03-29
Process finished with exit code 0
(2) Get the current date
from datetime import date
today = ()
print("current date =", today)
exports
Current date = 2022-03-29
Process finished with exit code 0
(3) Getting dates from timestamps
We can also create date objects from timestamps.Unix timestamps are the number of seconds between a specific date and January 1, 1970 in UTC. You can use the fromtimestamp() method to convert a timestamp to a date.
from datetime import date
timestamp = (1576244364)
print("dates =", timestamp)
exports
Date = 2019-12-13
Process finished with exit code 0
(4) Print today's year, month and day
from datetime import date
# Today's date object
today = ()
print("Current year:", )
print("Current month:", )
print("Current day:", )
exports
Current year: 2022
Current month: 3
Current day: 29
Process finished with exit code 0
2.2 Time class
(1) The time object instantiated from the time class represents the local time.
from datetime import time
# time(hour = 0, minute = 0, second = 0)
a = time()
print("a =", a)
# time(hour, minute and second)
b = time(11, 34, 56)
print("b =", b)
# time(hour, minute and second)
c = time(hour = 11, minute = 34, second = 56)
print("c =", c)
# time(hour, minute, second, microsecond)
d = time(11, 34, 56, 234566)
print("d =", d)exports
a = 00:00:00
b = 11:34:56
c = 11:34:56
d = 11:34:56.234566
Process finished with exit code 0
(2) Printing hours, minutes, seconds and microseconds
from datetime import time
a = time(11, 34, 56)
print("hourly=", )
print("minutes=", )
print("unit of angle or arc equivalent one sixtieth of a degree=", )
print("微unit of angle or arc equivalent one sixtieth of a degree=", )
exports
Hours = 11
Minutes = 34
Seconds = 56
Microseconds = 0
Process finished with exit code 0
2.3 The datetime class
(1) The datetime module has a named dateclass class that can contain information from date and time objects.
from datetime import datetime #datetime(year, month, day) a = datetime(2019, 11, 28) print(a) # datetime(year, month, day, hour, minute, second, microsecond) b = datetime(2019, 11, 28, 23, 55, 59, 342380) print(b)
exports
2019-11-28 00:00:00
2019-11-28 23:55:59.342380
Process finished with exit code 0
(2) Print year, month, hour, minute and time stamps
from datetime import datetime
a = datetime(2022, 3, 29, 23, 55, 59, 342380)
print("surname Nian =", )
print("moon =", )
print("date =", )
print("hour =", )
print("classifier for gifts; newspaper, magazine, documents etc. as a whole; for a complete menu of food. =", )
print("hour间戳 =", ())
exports
Year = 2022
Months = 3
Day = 29
Hour = 23
portions = 55
Timestamp = 1648569359.34238
Process finished with exit code 0
2.4 Classes
(1) The timedelta object represents the time difference between two dates or times.
from datetime import datetime, date
t1 = date(year = 2018, month = 7, day = 12)
t2 = date(year = 2017, month = 12, day = 23)
t3 = t1 - t2
print("t3 =", t3)
t4 = datetime(year = 2018, month = 7, day = 12, hour = 7, minute = 9, second = 33)
t5 = datetime(year = 2019, month = 6, day = 10, hour = 5, minute = 55, second = 13)
t6 = t4 - t5
print("t6 =", t6)
print("type of t3 =", type(t3))
print("type of t6 =", type(t6))
exports
t3 = 201 days, 0:00:00
t6 = -333 days, 1:14:20
type of t3 = <class ''>
type of t6 = <class ''>
Process finished with exit code 0
(2) Time difference between two timedelta objects
from datetime import timedelta
t1 = timedelta(weeks = 2, days = 5, hours = 1, seconds = 33)
t2 = timedelta(days = 4, hours = 11, minutes = 4, seconds = 54)
t3 = t1 - t2
print("t3 =", t3)
exports
t3 = 14 days, 13:55:39
Process finished with exit code 0
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