Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 9: Problem 12

What does the keys method return?

Short Answer

Expert verified
Answer: The keys method is a built-in function in various programming languages, such as Python, JavaScript, and Ruby, used on dictionaries (also known as hashes, maps, or associative arrays). This method returns a list of all the keys present in the dictionary. For example, given a dictionary of a student's grades in different subjects, using the keys method will provide a list of subjects (keys) in the dictionary.

Step by step solution

01

Definition of Keys Method

The keys method is a built-in function in various programming languages, like Python, JavaScript, and Ruby, which is used on dictionaries (also known as hashes, maps, or associative arrays). The method returns a list of all the keys present in the dictionary.
02

Example Usage

Let's consider a Python dictionary representing a student's grades in different subjects: grades = { "Math": 85, "English": 90, "Science": 95 } To obtain a list of the subjects (keys) in this dictionary, we use the keys method as follows: subjects = grades.keys() Now, the variable "subjects" will have the following list of keys: ["Math", "English", "Science"] From this example, we see that the keys method returns a list of the keys present in the dictionary, enabling us to access all the key values as needed.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

What does the values method return?

How do you determine the number of elements in a set?

When you open a file for the purpose of saving a pickled object to it, what file access mode do you use?

After the following statement executes, what elements will be stored in the myset set? myset \(=\) set (' Jupiter')

After the following code executes, what elements will be members of set3? \\[\begin{array}{l}\text { set1 }=\operatorname{set}([1,2,3,4]) \\ \text { set } 2=\operatorname{set}([3,4,5,6]) \\ \text { set } 3=\text { set } 1 . \text { intersection (set2) }\end{array}\\]
See all solutions

Recommended explanations on Computer Science Textbooks

Functional Programming

Read Explanation

Databases

Read Explanation

Computer Programming

Read Explanation

Theory of Computation

Read Explanation

Problem Solving Techniques

Read Explanation

Data Representation in Computer Science

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free