1
00:00:00,000 --> 00:00:05,130
One thing that makes Python so powerful and so amazing, frankly,

2
00:00:05,130 --> 00:00:09,030
is the fact that there are actually so many third-party packages.

3
00:00:09,030 --> 00:00:11,800
This is something that not a lot of other ecosystems have,

4
00:00:11,820 --> 00:00:14,880
and so basically, at any point in time, if you want to do

5
00:00:15,140 --> 00:00:18,470
really anything, for the most part, you don't have to write

6
00:00:18,480 --> 00:00:19,280
a lot of your own code,

7
00:00:19,280 --> 00:00:21,400
it probably exists to some degree already.

8
00:00:21,480 --> 00:00:26,100
So a third-party package can be easily installed with Python

9
00:00:26,110 --> 00:00:30,270
using a quick 'pip install' statement, and then to actually

10
00:00:30,280 --> 00:00:33,240
use it in your code is as simple as an 'import' statement,

11
00:00:33,460 --> 00:00:36,460
and then we can start using someone else's code that they've

12
00:00:36,460 --> 00:00:38,700
written in our projects.

13
00:00:39,500 --> 00:00:43,000
Now, packages are typically hosted on a service called 'PyPi',

14
00:00:43,000 --> 00:00:47,300
and if I boot up my browser here, and go to 'PyPi', or I'll

15
00:00:47,300 --> 00:00:50,200
just Google 'PyPi', and it is 'pypi.org',

16
00:00:50,220 --> 00:00:53,570
and this is where you're going to find any Python package

17
00:00:53,570 --> 00:00:56,100
that you can really think of.

18
00:00:56,100 --> 00:01:02,200
There's 1.7 million releases, 2.6 million files, 400,000

19
00:01:02,200 --> 00:01:06,599
users, and 226 different projects, 226,000 different

20
00:01:06,599 --> 00:01:11,200
projects. So for instance, if you were looking for a content

21
00:01:11,200 --> 00:01:15,600
management system written in Python, I know one off top of

22
00:01:15,600 --> 00:01:18,800
my head called 'wagtail', and all you would have to do here

23
00:01:18,900 --> 00:01:22,500
is 'pip install wagtail',

24
00:01:22,570 --> 00:01:25,690
then you can run 'wagtail.mysite', and you can basically

25
00:01:25,700 --> 00:01:29,200
be up and running with a content management system in a matter of seconds.

26
00:01:29,900 --> 00:01:32,900
But so far, we've really only used built-in functions like

27
00:01:33,020 --> 00:01:37,470
'print', and these are all part of the standard Python library,

28
00:01:37,470 --> 00:01:40,800
or known as built-in functions.

29
00:01:41,140 --> 00:01:43,900
So to download a third-party package, really, we just need to

30
00:01:43,900 --> 00:01:47,100
go to the command line, and use a tool called 'pip'.

31
00:01:47,100 --> 00:01:52,700
So if I open up my command line, you can type 'pip -V',

32
00:01:52,700 --> 00:01:54,900
and it will show you which version of 'pip' you're using.

33
00:01:55,000 --> 00:01:57,800
So for me, I'm using 'pip 18.1'.

34
00:01:58,000 --> 00:02:01,200
That comes from where my Python is currently being run from

35
00:02:01,200 --> 00:02:03,300
using Python 3.7.

36
00:02:03,300 --> 00:02:08,000
Yours should say either Python 3.6, 3.7, 3.8 or something newer as well.

37
00:02:08,000 --> 00:02:12,100
If that doesn't work for you, you can always try using 'pip3 -V'

38
00:02:12,180 --> 00:02:15,400
if you're one of the users that has to use instead of Python,

39
00:02:15,410 --> 00:02:19,480
instead of the 'python' command, you have to use 'python3'

40
00:02:19,490 --> 00:02:22,380
command. If you're one of those people, then you can also

41
00:02:22,380 --> 00:02:24,400
type 'pip3 -V'.

42
00:02:24,480 --> 00:02:27,360
And for me, this is going to use Python 3.8.

43
00:02:27,390 --> 00:02:30,940
But for you, it might actually use the right version of Python,

44
00:02:30,940 --> 00:02:32,400
just Python3 in general.

45
00:02:32,420 --> 00:02:35,210
In the next lesson, we're going to take a look at actually

46
00:02:35,210 --> 00:02:39,100
installing a third-party package and how we can use it.