1
00:00:00,000 --> 00:00:02,228
Okay, so you know strings, you know

2
00:00:02,229 --> 00:00:04,698
floats, you know integers, you know lists.

3
00:00:04,699 --> 00:00:07,028
Okay, so you know data types, but how

4
00:00:07,029 --> 00:00:09,642
can you actually do something in Python?

5
00:00:09,643 --> 00:00:12,250
What can you do with these data types?

6
00:00:12,251 --> 00:00:13,988
Well, to answer your question, you

7
00:00:13,989 --> 00:00:19,010
should look at the dir command.

8
00:00:19,011 --> 00:00:21,962
But let me now start to use the Python

9
00:00:21,963 --> 00:00:25,556
shell a little bit more to do things quick.

10
00:00:25,557 --> 00:00:28,460
So I'm going to split this into two.

11
00:00:28,461 --> 00:00:31,858
This is for executing the Python file.

12
00:00:31,859 --> 00:00:35,458
This is for the Interactive Python Shell.

13
00:00:35,459 --> 00:00:37,984
So what can we do with list?

14
00:00:37,985 --> 00:00:40,358
You can find that out by doing dir.

15
00:00:40,359 --> 00:00:44,460
dir is a function in Python that will give you

16
00:00:44,461 --> 00:00:48,033
[No audio]

17
00:00:48,033 --> 00:00:52,452
all the things you can do with a specific type.

18
00:00:52,453 --> 00:00:54,980
So with a list, in this case,

19
00:00:54,981 --> 00:00:58,720
all this here are attributes of list.

20
00:01:00,370 --> 00:01:03,460
You can do the same for checking int.

21
00:01:03,461 --> 00:01:05,766
[No audio]

22
00:01:05,766 --> 00:01:08,030
You can do the same for checking floats.

23
00:01:08,031 --> 00:01:10,900
dir float, dir str.

24
00:01:10,901 --> 00:01:12,866
[No audio]

25
00:01:12,870 --> 00:01:17,452
For example, let's do it with str before we go to list.

26
00:01:17,453 --> 00:01:21,548
With strings you can do for example, you

27
00:01:21,549 --> 00:01:25,350
can turn them into uppercase using these methods.

28
00:01:25,930 --> 00:01:33,068
To find out what upper does, you want to use help(str),

29
00:01:33,069 --> 00:01:36,570
that is a type that has the attribute upper.

30
00:01:37,150 --> 00:01:40,308
Now attributes are all these and they

31
00:01:40,309 --> 00:01:43,418
can be either methods or properties.

32
00:01:43,419 --> 00:01:46,880
You don't know that until you check with help.

33
00:01:46,881 --> 00:01:51,866
[No audio]

34
00:01:51,866 --> 00:01:56,742
So that is a help documentation for the upper method.

35
00:01:56,743 --> 00:01:59,440
It's a method as you can see here. q

36
00:01:59,441 --> 00:02:03,450
to quit and go back to the shell,

37
00:02:04,110 --> 00:02:06,784
and then let's go ahead and use that.

38
00:02:06,785 --> 00:02:09,310
"hello".upper().

39
00:02:09,970 --> 00:02:15,550
You use a method with round brackets with parentheses

40
00:02:16,290 --> 00:02:20,480
and that will return the capitalized version of hello.

41
00:02:21,010 --> 00:02:25,972
If we used title instead, that

42
00:02:25,973 --> 00:02:28,770
will capitalize the first letter only.

43
00:02:28,771 --> 00:02:32,433
Of course, you can use variables,

44
00:02:32,434 --> 00:02:38,966
[Author typing]

45
00:02:38,970 --> 00:02:40,802
and you get the same output.

46
00:02:40,803 --> 00:02:43,830
Now, what do we have for lists?

47
00:02:44,570 --> 00:02:46,946
How about calculating the average

48
00:02:46,947 --> 00:02:48,882
of the student_grades?

49
00:02:48,883 --> 00:02:50,680
Let's do that in the next video.

50
00:02:50,681 --> 00:02:54,033
[Outro sound]