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Python Dictionary Exercise

Last Updated : 01 Oct, 2021

Basic Dictionary Programs

Conversion of dictionary

Advance Dictionary Programs

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How to add values to dictionary in Python

In this article, we will learn what are the different ways to add values in a dictionary in Python. Assign values using unique keysAfter defining a dictionary we can index through it using a key and assign a value to it to make a key-value pair. C/C++ Code veg_dict = {} veg_dict[0] = 'Carrot' veg_di

Add new keys to a dictionary in Python

In this article, we will explore various methods to add new keys to a dictionary in Python. The simplest way to add a new key is by using Assignment operator (=). Using = Assignment Operator[GFGTABS] Python d = {"a": 1, "b": 2} # Adding a new key-value pair d["c"] = 3 p

Add item after given Key in dictionary in Python

To add an item after a given key in a dictionary we need to carefully manage the order of the items. Since Python 3.7 dictionaries maintain the order in which items are inserted. Using LoopThe idea is to iterate over the dictionary and copy each key: value pair to a new dictionary. When target key i

Python | Ways to remove a key from dictionary

Dictionary is used in manifold practical applications such as day-day programming, web development, and AI/ML programming as well, making it a useful container overall. Hence, knowing shorthands for achieving different tasks related to dictionary usage always is a plus. This article deals with one s

Python | Removing dictionary from list of dictionaries

The common utility to remove the dictionary corresponding to particular key in a list of dictionaries is also a problem whose concise version is always helpful. This has application in web development due to the introduction of No-SQL databases, which work mostly on Key-Value pairs. Let's discuss ce

Python | Remove item from dictionary when key is unknown

Dictionary is a collection which is unordered, changeable and indexed. In Python, dictionaries are written with curly brackets, and they have keys and values. It is widely used in day to day programming, web development, and machine learning. Let's discuss the various ways to remove items from the d

Python - Test if all Values are Same in Dictionary

Given a dictionary, test if all its values are the same. Input : test_dict = {"Gfg" : 8, "is" : 8, "Best" : 8} Output : True Explanation : All element values are same, 8. Input : test_dict = {"Gfg" : 8, "is" : 8, "Best" : 9} Output : False Explanation : All element values not same. Method #1: Using

Python | Test if element is dictionary value

Sometimes, while working with a Python dictionary, we have a specific use case in which we just need to find if a particular value is present in the dictionary as it's any key's value. This can have use cases in any field of programming one can think of. Let's discuss certain ways in which this prob

Why is iterating over a dictionary slow in Python?

In this article, we are going to discuss why is iterating over a dict so slow in Python? Before coming to any conclusion lets have a look at the performance difference between NumPy arrays and dictionaries in python: Python Code # import modules import numpy as np import sys # compute numpy performa

Iterate over a dictionary in Python

In this article, we will cover How to Iterate Through a Dictionary in Python. To Loop through values in a dictionary you can use built-in methods like values(), items() or even directly iterate over the dictionary to access values with keys. How to Loop Through a Dictionary in PythonThere are multip

Python - How to Iterate over nested dictionary ?

In this article, we will discuss how to iterate over a nested dictionary in Python. Nested dictionary means dictionary inside a dictionary and we are going to see every possible way of iterating over such a data structure. Nested dictionary in use: {'Student 1': {'Name': 'Bobby', 'Id': 1, 'Age': 20}

Python | Delete items from dictionary while iterating

A dictionary in Python is an ordered collection of data values. Unlike other Data Types that hold only a single value as an element, a dictionary holds the key: value pairs. Dictionary keys must be unique and must be of an immutable data type such as a: string, integer or tuple. Note: In Python 2 di

Python Dictionary Methods

Python dictionary methods is collection of Python functions that operates on Dictionary. Python Dictionary is like a map that is used to store data in the form of a key: value pair. Python provides various built-in functions to deal with dictionaries. In this article, we will see a list of all the f

Python Dictionary Exercise

Basic Dictionary ProgramsPython | Sort Python Dictionaries by Key or ValueHandling missing keys in Python dictionariesPython dictionary with keys having multiple inputsPython program to find the sum of all items in a dictionaryPython program to find the size of a DictionaryWays to sort list of dicti

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