Chapter 9 Tuples, Lists, & Dictionaries

colors = ["red", "green", "burnt sienna", "blue"] colors[2] What is the output of the colors[2] expression?

• It causes a run-time error.
• 'blue'
• 'red'
• 'green'
• 'burnt sienna'

colors = ["red", "green", "burnt sienna", "blue"] Select the value 'red' from the above list?

(a)  

colors = ["red", "green", "burnt sienna", "blue"] "yellow" in colors What is the result of the yellow in colors expression?

• 3
• 4
• ValueError: 'yellow' is not in list
• False

Consider the following nested list definition:

x = [10, [3.141, 20, [30, 'baz', 2.718]], 'foo']

What is the expression that returns the 'z' in 'baz'?

(a)  

What’s the main difference between Python lists and tuples?

• Lists are faster and tuples are slower.
• Lists are mutable and tuples are immutable.
• Lists can hold any data type and tuples can only contain int and str objects.
• Lists are immutable and tuples are mutable.

How do you assign a tuple of length 1 to the variable a?

• a = [1]
• a = 1
• a = tuple(1)
• a = (1,)

Which of the following are true of Python dictionaries:

• Dictionaries are accessed by key.
• Dictionaries can be nested to any depth.
• Dictionaries are mutable.
• Items are accessed by their position in a dictionary.
• All the keys in a dictionary must be of the same type.

Write the Python code that prints out Captain Kirk’s email address from the employee dictionary below: employee = { "id": 1701, "name": "James T Kirk", "email": "[e-mail]", "position": "captain", }

(a)  

If nest = [[0, 1] , [2, 3], [4, 5]],

then len(nest) = 3

and len(nest[0]) = 2

• True
• False

A list is... Mark all that apply

• Ordered
• Changeable
• Created with []
• Can be nested
• Immutable