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Chapter 9: Problem 13

What does the values method return?

Short Answer

Expert verified
Answer: The 'values' method returns a view object that displays a list of all the values in the dictionary. The view object is dynamic, meaning it reflects any changes made to the dictionary. To convert the view object to a list, use the 'list()' function on the view object, like this: 'list(values_view)'. This resulting list is not dynamic and won't be affected by changes to the original dictionary.

Step by step solution

01

Introduction to Dictionaries in Python

A dictionary in Python is an unordered collection of key-value pairs, where keys are unique, and values may not be. Dictionaries are mutable and can be changed at any time. Dictionaries are defined by curly brackets `{}` and key-value pairs are separated by commas.
02

Using the values Method

In Python, the `values` method is associated with dictionaries, and it is used to return a view object that displays a list of all the values in the dictionary. The syntax for using the `values` method is: `dictionary_name.values()`
03

Example of using values method

Consider the following dictionary: example_dict = { "apple": 23, "banana": 45, "orange": 38, "grapes": 12 } Now, let's use the `values` method on this dictionary: values_view = example_dict.values() After executing this command, `values_view` will contain a 'view object' of the dictionary values, which is: `[23, 45, 38, 12]`. Keep in mind that the returned view object is dynamic and will reflect any change to the dictionary. If a value is modified or a new key-value pair is added, the view object will immediately reflect those changes.
04

Converting the View Object to a List

You can convert the view object returned by the values method into a list using the `list()` function: values_list = list(values_view) Now, `values_list` will hold the list `[23, 45, 38, 12]`. This list is not dynamic, and changes to the original dictionary will not affect `values_list`.

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