Dictionary keys, values, and items in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the keys() method of a dictionary return?

The keys() method returns a view object that displays a dynamic view of all the keys in the dictionary.

beginner

How can you get all the values from a dictionary?

You can use the values() method to get a view object containing all the values in the dictionary.

beginner

What does the items() method return in a dictionary?

The items() method returns a view object of tuples, where each tuple contains a key and its corresponding value.

beginner

How can you loop through both keys and values of a dictionary at the same time?

Use a for loop with items(), like: for key, value in my_dict.items(): to access both keys and values.

intermediate

Are the objects returned by keys(), values(), and items() lists?

No, they are view objects that reflect changes in the dictionary but behave like sets or sequences, not regular lists.

What type of object does my_dict.keys() return?

A A view object of dictionary keys

B A list of dictionary keys

C A tuple of dictionary keys

D A string of dictionary keys

The keys() method returns a view object, not a list or tuple.

Which method gives you both keys and values from a dictionary?

A items()

B keys()

C values()

D get()

The items() method returns key-value pairs as tuples.

How do you access the value inside a loop using items()?

A for key in my_dict.items(): value = key

B for key, value in my_dict.items(): pass

C for value in my_dict.values(): pass

D for key in my_dict.keys(): value = key

Using for key, value in my_dict.items(): unpacks each key-value pair.

If you change a dictionary after calling keys(), what happens to the keys view?

A It stays the same as when created

B It becomes a list

C It raises an error

D It updates to reflect the change

The keys view reflects changes in the dictionary dynamically.

Which of these is NOT true about dictionary views?

A They reflect changes in the dictionary

B They can be iterated over

C They are lists

D They show current keys, values, or items

Dictionary views are not lists; they are special view objects.

Explain how to get and use the keys, values, and items of a dictionary in Python.

Think about how you can see just keys, just values, or both together.

Describe what happens to the objects returned by keys(), values(), and items() if the dictionary changes.

Consider if these objects are snapshots or live views.