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Python | Pretty Print a dictionary with dictionary value This article provides a quick way to pretty How to Print Dictionary in Python that has a dictionary as values. This is required many times nowadays with the advent of NoSQL databases. Let's code a way to perform this particular task in Python. Example Input:{'gfg': {'remark': 'good', 'rate': 5}, 'cs': {'rate': 3}} Output: gfg: remark: good rate: 5 7 min read Python | Set 4 (Dictionary, Keywords in Python) In the previous two articles (Set 2 and Set 3), we discussed the basics of python. In this article, we will learn more about python and feel the power of python. Dictionary in Python In python, the dictionary is similar to hash or maps in other languages. It consists of key-value pairs. The value can be accessed by a unique key in the dictionary. ( 5 min read Print anagrams together in Python using List and Dictionary Given an array of words, print all anagrams together. Examples: Input: arr = ['cat', 'dog', 'tac', 'god', 'act'] Output: 'cat tac act dog god' This problem has existing solution please refer Anagrams and Given a sequence of words, print all anagrams together links. We will solve this problem in python using List and Dictionary data structures. Appr 2 min read Python dictionary, set and counter to check if frequencies can become same Given a string which contains lower alphabetic characters, we need to remove at most one character from this string in such a way that frequency of each distinct character becomes same in the string. Examples: Input : str = “xyyz” Output : Yes We can remove character ’y’ from above string to make the frequency of each character same. Input : str = 2 min read Find the first repeated word in a string in Python using Dictionary Prerequisite : Dictionary data structure Given a string, Find the 1st repeated word in a string. Examples: Input : "Ravi had been saying that he had been there" Output : had Input : "Ravi had been saying that" Output : No Repetition Input : "he had had he" Output : he We have existing solution for this problem please refer Find the first repeated w 4 min read Dictionary and counter in Python to find winner of election Given an array of names of candidates in an election. A candidate name in the array represents a vote cast to the candidate. Print the name of candidates received Max vote. If there is tie, print a lexicographically smaller name. Examples: Input : votes[] = {"john", "johnny", "jackie", "johnny", "john", "jackie", "jamie", "jamie", "john", "johnny", 3 min read Python counter and dictionary intersection example (Make a string using deletion and rearrangement) Given two strings, find if we can make first string from second by deleting some characters from second and rearranging remaining characters. Examples: Input : s1 = ABHISHEKsinGH : s2 = gfhfBHkooIHnfndSHEKsiAnG Output : Possible Input : s1 = Hello : s2 = dnaKfhelddf Output : Not Possible Input : s1 = GeeksforGeeks : s2 = rteksfoGrdsskGeggehes Outpu 2 min read Program to print all distinct elements of a given integer array in Python | Ordered Dictionary Given an integer array, print all distinct elements in array. The given array may contain duplicates and the output should print every element only once. The given array is not sorted. Examples: Input: arr[] = {12, 10, 9, 45, 2, 10, 10, 45} Output: 12, 10, 9, 45, 2 Input: arr[] = {1, 2, 3, 4, 5} Output: 1, 2, 3, 4, 5 Input: arr[] = {1, 1, 1, 1, 1} 2 min read Python | Convert a list of Tuples into Dictionary Sometimes you might need to convert a tuple to dict object to make it more readable. In this article, we will try to learn how to convert a list of tuples into a dictionary. Here we will find two methods of doing this. Examples: Input : [("akash", 10), ("gaurav", 12), ("anand", 14), ("suraj", 20), ("akhil", 25), ("ashish", 30)] Output : {'akash': [ 6 min read Python Dictionary to find mirror characters in a string Given a string and a number N, we need to mirror the characters from the N-th position up to the length of the string in alphabetical order. In mirror operation, we change ‘a’ to ‘z’, ‘b’ to ‘y’, and so on. Examples: Input : N = 3 paradox Output : paizwlc We mirror characters from position 3 to end. Input : N = 6 pneumonia Output : pneumlmrz We hav 2 min read Python Dictionary | Check if binary representations of two numbers are anagram Given two numbers you are required to check whether they are anagrams of each other or not in binary representation. Examples: Input : a = 8, b = 4 Output : YesBinary representations of bothnumbers have same 0s and 1s.Input : a = 4, b = 5Output : NoCheck if binary representations of two numbersWe have existing solution for this problem please refer 3 min read Python Dictionary clear() The clear() method removes all items from the dictionary. Syntax: dict.clear() Parameters: The clear() method doesn't take any parameters. Returns: The clear() method doesn't return any value. Parameters: The clear() method take O(n) time. Examples: Input : d = {1: "geeks", 2: "for"} d.clear() Output : d = {} Error: As we are not passing any parame 2 min read Python Dictionary copy() Python Dictionary copy() method returns a shallow copy of the dictionary. let's see the Python Dictionary copy() method with examples: Examples Input: original = {1:'geeks', 2:'for'} new = original.copy() // Operation Output: original: {1: 'one', 2: 'two'} new: {1: 'one', 2: 'two'}Syntax of copy() method Syntax: dict.copy() Return: This method does 3 min read Python dictionary values() values() is an inbuilt method in Python programming language that returns a view object. The view object contains the values of the dictionary, as a list. If you use the type() method on the return value, you get "dict_values object". It must be cast to obtain the actual list. Python Dictionary values() Method Syntax Syntax: dictionary_name.values( 2 min read How to use a List as a key of a Dictionary in Python 3? In Python, we use dictionaries to check if an item is present or not . Dictionaries use key:value pair to search if a key is present or not and if the key is present what is its value . We can use integer, string, tuples as dictionary keys but cannot use list as a key of it . The reason is explained below . How does Python Dictionaries search their 3 min read Counting the frequencies in a list using dictionary in Python Given an unsorted list of some elements(which may or may not be integers), Find the frequency of each distinct element in the list using a Python dictionary. Example: Input: [1, 1, 1, 5, 5, 3, 1, 3, 3, 1, 4, 4, 4, 2, 2, 2, 2] Output: 1 : 5 2 : 4 3 : 3 4 : 3 5 : 2 Explanation: Here 1 occurs 5 times, 2 occurs 4 times and so on... The problem can be s 4 min read Python | Passing dictionary as keyword arguments Many times while working with Python dictionaries, due to advent of OOP Paradigm, Modularity is focussed in different facets of programming. Hence there can be many use cases in which we require to pass a dictionary as argument to a function. But this required the unpacking of dictionary keys as arguments and it's values as argument values. Let's d 3 min read Python dictionary with keys having multiple inputs Prerequisite: Python-Dictionary. How to create a dictionary where a key is formed using inputs? Let us consider an example where have an equation for three input variables, x, y, and z. We want to store values of equation for different input triplets. Example 1: C/C++ Code # Python code to demonstrate a dictionary # with multiple inputs in a key. i 4 min read Python | Filter dictionary of tuples by condition Sometimes, we can have a very specific problem in which we are given a tuple pair as values in dictionary and we need to filter dictionary items according to those pairs. This particular problem as use case in Many geometry algorithms in competitive programming. Let's discuss certain ways in which this task can be performed. Method #1 : Using items 3 min read Python | Ways to Copy Dictionary 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. When we simply assign dict1 = dict2 it refers to the same dictionary. Let's discuss a few ways to copy the 3 min read Python Dictionary fromkeys() Method Python dictionary fromkeys() function returns the dictionary with key mapped and specific value. It creates a new dictionary from the given sequence with the specific value. Python Dictionary fromkeys() Method Syntax: Syntax : fromkeys(seq, val) Parameters : seq : The sequence to be transformed into a dictionary.val : Initial values that need to be 3 min read Python Dictionary setdefault() Method Python Dictionary setdefault() returns the value of a key (if the key is in dictionary). Else, it inserts a key with the default value to the dictionary. Python Dictionary setdefault() Method Syntax: Syntax: dict.setdefault(key, default_value)Parameters: It takes two parameters: key - Key to be searched in the dictionary. default_value (optional) - 2 min read Python Dictionary popitem() method Python dictionary popitem() method removes the last inserted key-value pair from the dictionary and returns it as a tuple. Python Dictionary popitem() Method Syntax: Syntax : dict.popitem() Parameters : None Returns : A tuple containing the arbitrary key-value pair from dictionary. That pair is removed from dictionary. Note: popitem() method return 2 min read Python dictionary (Avoiding Mistakes) What is dict in python ? Python dictionary is similar to hash table in languages like C++. Dictionary are used to create a key value pair in python. In place of key there can be used String Number and Tuple etc. In place of values there can be anything. Python Dictionary is represented by curly braces. An empty dictionary is represented by {}. In P 4 min read Python Nested Dictionary A Dictionary in Python works similarly to the Dictionary in the real world. The keys of a Dictionary must be unique and of immutable data types such as Strings, Integers, and tuples, but the key values can be repeated and be of any type. What is Python in Nested Dictionary? Nesting Dictionary means putting a dictionary inside another dictionary. Ne 3 min read 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 dictionary keys were unordered. As of Python 3, they 3 min read Python | Find depth of a dictionary Prerequisite: Nested dictionary The task is to find the depth of given dictionary in Python. Let's discuss all different methods to do this task. Examples: Input : {1:'a', 2: {3: {4: {}}}} Output : 4 Input : {'a':1, 'b': {'c':'geek'}} Output : 3 Approach #1 : Naive Approach A naive approach in order to find the depth of a dictionary is to count the 5 min read Python | Ways to create a dictionary of Lists Till now, we have seen the ways to create a dictionary in multiple ways and different operations on the key and values in the Python dictionary. Now, let's see different ways of creating a dictionary of lists. Note that the restriction with keys in the Python dictionary is only immutable data types can be used as keys, which means we cannot use a d 6 min read Python | Count number of items in a dictionary value that is a list In Python, dictionary is a collection which is unordered, changeable and indexed. Dictionaries are written with curly brackets, and they have keys and values. It is used to hash a particular key. A dictionary has multiple key:value pairs. There can be multiple pairs where value corresponding to a key is a list. To check that the value is a list or 5 min read Python | Check if given multiple keys exist in a dictionary A dictionary in Python consists of a collection of key-value pairs. Each key-value pair maps the key to its associated value. Input : dict[] = {"geeksforgeeks" : 1, "practice" : 2, "contribute" :3} keys[] = {"geeksforgeeks", "practice"} Output : Yes Input : dict[] = {"geeksforgeeks" : 1, "practice" : 2, "contribute" :3} keys[] = {"geeksforgeeks", " 3 min read