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You have completed Python Dates and Times!
You have completed Python Dates and Times!
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Get acquainted with the Birthday App in this walkthrough video. While you'll focus on mastering `datetime` related functions, it's essential to grasp the app's overall structure. Join us as we navigate through the app's key components, gaining a comprehensive understanding of its features and functionality.
Project Files
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Resources
- PyCharm - Scroll down to "PyCharm Community Edition"
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[MUSIC]
0:00
We've reached an exciting
phase of our journey.
0:05
It's project time.
0:08
We'll be applying all that we learned
about Python's date and time handling to
0:10
complete the two projects that you
saw at the beginning of the course.
0:14
Now, keep in mind that
in the world of coding,
0:19
there's never just one
way to achieve a goal.
0:22
So, don't be afraid to experiment and
find your unique solutions.
0:26
Feel free to pause the videos whenever
you want to give it a try yourself.
0:30
But above all,
remember to enjoy the process.
0:35
These projects are your canvas and
your code is your paintbrush.
0:39
So let's have some fun and
create something amazing together.
0:43
Download the project files and
open them up in your favorite code editor.
0:48
I'll be using Pycharm Community Edition
which is a free open source version of
0:53
Pycharm.
0:58
I'll leave a link to this in
the teacher's notes if you're interested.
1:00
I've got my terminal open up to the right.
1:05
But if you're used to seeing it
at the bottom of your screen,
1:08
feel free to keep it down there.
1:10
When working in a large team,
1:14
you'll likely only be in charge of
a specific set of functions in the app.
1:16
In our case, we're responsible for
the functions to do with date and time.
1:21
You'll need a good understanding of
how the app already works though, so
1:27
you can add your contributions.
1:30
A good first step is to always check
the readme file, so let's check it out.
1:33
We've got an introduction
explaining the app.
1:39
Getting started section,
a mission section and
1:43
some extra challenges. Pause me
to have a read for yourself.
1:47
It says here in the introduction
that we should explore the files and
1:53
run the app to get
familiar with the project.
1:57
So, let's first run through
how the app is structured and
2:00
what you'll need to do to finish the app.
2:04
Main.py is where the main logic sits.
2:06
This is a file that will be
executed to launch our app.
2:13
It runs a CSV and
loads data into this people variable.
2:17
It then presents users with a menu and
2:22
then performs an action
depending on the input.
2:24
We can see that each choice leads to
different functions in our menus file.
2:29
So let's go have a look.
2:34
In a larger team, another developer likely
worked on all functions related to menus.
2:37
Let's have a look at what they did.
2:43
We've got the main menu function,
which displays the menu and
2:46
runs some error handling on the input.
2:49
We've got a back to main menu function,
2:51
which just displays the press any key
to return to main menu for users.
2:54
Then we've got our three menu functions
that gets run based on what user's input.
2:59
Upcoming birthdays menu takes
the list of people from the CSV, and
3:06
passes it into the upcoming birthdays
function in the functions file.
3:10
It looks like 90 was also passed in.
3:16
We'll see later that this is used to grab
the birthdays within the next 90 days.
3:19
Check ages menu takes the list
of people from the CSV, and
3:25
then ask the user to decide which
person to check the age of.
3:29
Depending on the input, the function
will grab that person from the data and
3:34
pass it into the display age
function in the functions file.
3:38
Now we can also see some error handling at
the bottom to handle unexpected inputs.
3:42
Age difference menu is a big one.
3:49
It takes the list of people from the CSV,
3:52
and then ask the user to select two
people to compare the birthday of.
3:54
There is some error handling for
user input.
3:58
Here, it calls the display_age function
from the functions file again for
4:01
each person.
4:06
And then it passes both people's data
into the display_age_dfference function
4:08
from the functions file.
4:13
So it looks like there's a lot that
goes on in the functions file.
4:17
So let's check it out.
4:21
And here, we've reached the part of
the app that is our responsibility.
4:23
The functions related to dates and times.
4:28
Each of the three functions that we
saw being called earlier are all here,
4:32
but instead of code, the previous
developer has left us some to-dos and
4:37
some templates to follow.
4:42
There are some print statements here
that give us some insight into what each
4:44
of these variables hold.
4:48
So let's run the app to have
a look at what we can work with.
4:50
Python3 main.py. Let's select option one.
4:54
Option one gives us
a list of dictionaries.
5:05
Option two lets us pick
from a list of IDs, and
5:10
inputting one of these IDs
will give us one dictionary.
5:13
Option three asks us to input two ids, and
5:19
then calls the display age function for
both ids.
5:22
So we're seeing the individual
dictionaries for both.
5:26
And then we get a list of two
dictionaries, one for each id.
5:30
Let's head back to the readme
getting started section,
5:35
since we're about to get started.
5:38
In anticipation of using relative delta,
5:41
we'll want to make sure
we have access to it.
5:44
So let's create a virtual environment,
5:48
activate it, and install dateutil.
5:52
Python3-m venv myapp-env, and
5:56
then we'll activate it with
source myapp-env/bin.activate.
6:01
And then we'll install dateutil by
6:10
using pip install python-dateutil.
6:14
With all that done, we can dive
right in and complete this app.
6:21
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