phonebook program in python using dictionary

Phonebook program in python using dictionary code#

For instance, mapping user IDs in a database to their corresponding usernames. Mapping Data for Faster Access: Dictionaries can be employed to map data, accelerating access.For instance, they can tally word occurrences in a document. Counting and Aggregating Data: Dictionaries facilitate counting and aggregating data.Storing and Retrieving Configuration Data: Dictionaries can house configuration data for applications, such as database connection details.My_contacts = dict( frozenset())ĭictionaries prove highly adaptable and find application in various scenarios:

Phonebook program in python using dictionary code#

For instance, the following code establishes a straightforward dictionary: Each key-value pair is demarcated by a colon. To instantiate dictionaries, employ curly braces. Readability: Dictionaries feature a user-friendly and easily comprehensible structure, making them well-suited for storing and retrieving data in a human-readable format.Flexibility: Dictionaries accommodate a wide range of data types, rendering them a versatile choice for data organization.

They achieve this by employing a hash table for data storage, permitting constant-time access to values, regardless of dictionary size. Efficiency: Dictionaries excel at rapid data retrieval and searching.Several compelling reasons advocate for their use: In such a dictionary, the keys might represent the names of individuals, while the values could denote their respective phone numbers, email addresses, and mailing addresses.ĭictionaries emerge as a potent data structure adaptable to an array of tasks. For example, they can be employed to organize contact details for friends and family.

Correspondingly, each key can be linked to any type of object.ĭictionaries are frequently utilized for efficient data storage and retrieval. What is a Python Dictionary?Ī Python dictionary serves as a collection of key-value pairs, in which each key is distinct and can encompass various object types, such as strings, numbers, or tuples. In this blog, we'll explore everything about Python dictionaries, from the basics to more advanced techniques. If ( it != phoneBook.Dictionaries in Python are versatile and fundamental data structures that make it different from other programming languages. Read names and numbers, add to phoneBook: Note: Names consist of lowercase English alphabetic letters and are first names only. Each line (query) contains a name to look up, and you must continue reading lines until there is no more input. The first value is a friend’s name, and the second value is an 8-digit phone number.Īfter the n lines of phone book entries, there are an unknown number of lines of queries. The first line contains an integer, n, denoting the number of entries in the phone book.Įach of the n subsequent lines describes an entry in the form of 2 space-separated values on a single line. Note: Your phone book should be a Dictionary/Map/HashMap data structure. For each name queried, print the associated entry from your phone book on a new line in the form name=phoneNumber if an entry for name is not found, print Not found instead. You will then be given an unknown number of names to query your phone book for.

Given n names and phone numbers, assemble a phone book that maps friends’ names to their respective phone numbers.