One-dimensional Lists

One-Dimensional Lists

Working with 1-D Lists in Python

Multiple Select

Choose all the properties of a variable ...

• has a name

• has a value

• resides in memory

• has a data type

• value cannot be changed

Multiple Choice

What is the best description of a data structure in computer science?

• A container that can hold multiple values

• Several containers that can hold multiple values

• A container that can store data in a number of different structures

• A variety of structures to store the same data in

Multiple Select

Choose all the statements that are true about traditional arrays ...

• is a sequential data structure

• all items must be of the same data type

• data items are seperated by commas

• has a named identifier

Multiple Choice

What data type does this list contain?

colours = ["red", "green", "blue", "yellow"]

• str

• int

• float

• bool

Multiple Choice

What is the meaning of this list assignment?

scores = []

• Makes scores a list with no items

• Makes scores a list but says nothing about its contents

• Makes scores = 0

• Makes scores a variable

Fill in the Blank

If scores = [12, 7, 9, 3, 11, 15, 16]

what is the value of scores[4]

Fill in the Blank

If names = ['bill', 'ben', 'bri', 'bro', 'baz', 'bud', 'bif']

what is the index position of 'bif'?

Fill in the Blank

colours = ["red", "green", "blue", "yellow"]

Type the code to add the colour "purple" to the list.

Fill in the Blank

names = ['bill', 'ben', 'bri', 'bro', 'baz', 'bud', 'bif']

Type the code to remove 'bri' from the list.

Fill in the Blank

scores = [12, 7, 11, 3, 11, 15, 7, 16]

Type the code to delete the 2nd 11 from the list.

Multiple Select

What's the difference between using ".remove()" and "del"?

• ".remove()" deletes the first occurence of item only

• "del" deletes item at specific index position

• using ".remove()" can cause program to crash if item is not in list

• using "del" is less unpredictable

Open Ended

Thinking Hard

Create a short test about what you have been learning about in this lesson.

Make a note of the answers.

(use Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it