Consider a list of phone numbers (see the sample below), where each element (phone number) in that list is a 12-character long string and the first 3 characters represent an area code. Write a program that takes a list similar to this and creates a dictionary to store the total number of phone numbers for each area. i.e., {area code : total phone numbers for this area code}. phonebook = [‘123-456-7890’, ‘234-567-8901’, ‘345-6789-0123’, ‘123-000-9999’] Sample output for the phonebook list should be: {‘123’:2, ‘234’:1, ‘345’:1}
Consider a list of phone numbers (see the sample below), where each element (phone number) in that list is a 12-character long string and the first 3 characters represent an area code. Write a program that takes a list similar to this and creates a dictionary to store the total number of phone numbers for each area. i.e., {area code : total phone numbers for this area code}. phonebook = [‘123-456-7890’, ‘234-567-8901’, ‘345-6789-0123’, ‘123-000-9999’] Sample output for the phonebook list should be: {‘123’:2, ‘234’:1, ‘345’:1}
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider a list of phone numbers (see the sample below), where each element (phone
number) in that list is a 12-character long string and the first 3 characters represent an area
code. Write a
total number of phone numbers for each area. i.e., {area code : total phone numbers for this
area code}.
phonebook = [‘123-456-7890’, ‘234-567-8901’, ‘345-6789-0123’,
‘123-000-9999’]
Sample output for the phonebook list should be: {‘123’:2, ‘234’:1, ‘345’:1}
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