python data structure 1

What is the output of the colors[2] expression?

• 'burnt sienna'

• 'green'

• It causes a run-time error.

• 'red'

• 'blue'

How would you access the element 'red' from the above list?

What is the result of the "yellow in colors" expression?

• False

• True

• 3

• Errors

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

What is the expression that returns the 2.718?

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

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

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

• Lists are faster and tuples are slower.

• Lists are immutable and tuples are mutable.

• Lists are mutable and tuples are immutable.

• Correct

  Lists can hold any data type and tuples can only contain int and str objects.

Create a variable to store some information of James. We need to store his name "James", his email "[e-mail]", his mobile [phone].

What data structure would you like to use?

• List

• Dictionary

• Tuple

• Set

Which of the following are not true of Python dictionaries:

• Dictionaries are accessed by key.

• All the keys in a dictionary must be of the same type.

• Dictionaries can be nested to any depth.

• Dictionaries are mutable.

Define a dictionary d as shown in the figure. Write down you code:

We need to store some information of James. For example, his name "James", his email "[e-mail]", his mobile "07746330330".

Write down the code to create a variable that stores above information of James.