Python L20 Dictionary

What symbol is used to define a dictionary in Python?

• []

• {}

• ()

• <>

Which of the following is a correct dictionary entry in Python?

• ["Bug": "An error in the program"]

• {Bug, "An error in the program"}

• {"Bug": "An error in the program"}

• ("Bug": "An error in the program")

How do you retrieve the value of the key "Bug" from programming_dictionary?

• programming_dictionary["Bug"]

• programming_dictionary("Bug")

• programming_dictionary.Bug

• programming_dictionary["Function"]

You can use a comma to separate different key-value pairs in a dictionary.

• True

• False

Dictionaries in Python are indexed using numbers like lists.

• True

• False

Answer explanation

Dictionaries in Python are not indexed using numbers like lists. Instead, they use keys to access values.

An empty dictionary can be created using empty_dictionary = {}.

• True

• False

Match the key with its correct definition:

• Function

• The action of doing something repeatedly

• Bug

• A piece of code that you can call over and over again

• Loop

• An error in a program that prevents it from running as expected

To delete all items in a dictionary, assign it to ​ (a)   .

• {}
• ()
• []
• <>

To edit the value of an existing key in a dictionary, use __________ and assign a new value.

• dictionary_name["Key"] = "New Value"

• dictionary_name("Key") = "New Value"

• dictionary_name.Key
  

• dictionary_name["Key": "New Value"]

Answer explanation

Place the following actions into the correct category:

Groups:

(a) Get Value

,

(b) Edit

,

(c) Delete

• dict["Bug"]

• {}

• dict["new"] = "value"

• for key in dict: