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In this video, we look at the `datetime` module's `datetime` class, where we can work seamlessly with both date and time. We'll explore how to create `datetime `objects, leveraging the `year`, `month`, `day`, `hour`, `minute`, `second`, and `microsecond` components.
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Programmers often need
to handle both date and
0:03
time at the same time, and you will too.
0:06
The datetime module provides
a class to do so, datetime.
0:10
To access this class,
we'll need to use datetime.datetime.
0:15
Yes, the datetime module
has a datetime class.
0:22
This can be the source of some confusion,
so let's break it down.
0:26
datetime.time taps into
the datetime module,
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and then into its time class.
0:35
Similarly, datetime.date taps
into the datetime module and
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then into its date class.
0:43
Finally, datetime.datetime taps
into the datetime module and
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then into its datetime class.
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The first datetime is the module.
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This is the one that we import
using import datetime and
0:56
the second datetime is the class.
1:01
This is what we can use to
create a datetime object, and
1:03
has methods for
us to work with dates and times.
1:08
Let's create a datetime object
using the class constructor.
1:12
The date time class constructor
takes all the arguments that we've
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already encountered from date and
time, year, month, day, hour,
1:22
minute, second, and microsecond.
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Just like with date, the year,
month, and day are required,
1:29
and just like with time,
hour, minute, second, and
1:34
microsecond have a default of zero and
are not required.
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For example, year equals 2023,
month equals 8,
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day equals 25, hour equals 15,
and minute equals 30.
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Would give us a datetime object for
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3:30 PM, 25th of August, 2023.
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Let's check it out,
datetime.datetime(year=2023,
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month=8, day=25.
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Hour=15, minute=30 will give
us exactly what we asked for.
2:13
This can also be simplified to
exclude the attribute names.
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Let's save this in a dt variable.
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dt = datetime.datetime.
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2023, 8, 25, 15, 30.
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Once again, since this is an object,
we can access each property,
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dt.year for the year, dt.month for
the month, and so on.
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Just like our other object types,
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datetime comes with methods
to help us work with it.
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Here are some common ones, datetime.now,
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similar to date.today
creates an instance with
3:01
a current local date and
time down to the microsecond.
3:06
Let's check it out, datetime.datetime.now
3:11
Combine does what the name suggests.
3:18
It combines a date object and
a time object to form a new datetime
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object that contains
the properties of both.
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This is especially useful if your
app handles the two separately, but
3:30
you want to store the data as
a single date time object.
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Let's see it in action,
d = datetime.date.today.
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T = datetime.time 8 AM.
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Datetime.datetime.combine d,t
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We can also go the other way.
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To extract a date object from the datetime
object, we simply have to use .date.
4:01
Dt=datetime.datetime.now dt.date
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Similarly, extracting a time object from
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a datetime object is as
easy as using .time.
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Replace also does what the name suggests.
4:29
It allows us to replace a particular
property of the datetime object.
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Such as the year or the month.
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This is also available for
the time and date classes.
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Let's check it out.
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Dt = datetime.datetime.now,
let's check it out.
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Now let's replace it with
new dt = dt.replace on gonna
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change the year to 2000 and
let's check it out.
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Everything's the same but the year.
5:02
Datetime also has methods that
we already learned about.
5:05
Weekday, isoweekday, and isocalendar
are also available for the datetime class.
5:09
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