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Database System Concepts
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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Need help solving this in python

**Lab Activity: Word Frequencies (Dictionaries)** **Objective**: To build a dictionary that counts the frequency of each word in a given list of words. ### Provided Code Template: ```python def build_dictionary(words): # The frequencies dictionary will be built with your code below. # Each key is a word string and the corresponding value is an integer # indicating that word's frequency. ''' Type your code here (remove the "pass" statement below) ''' pass # The following code asks for input, splits the input into a word list, # calls build_dictionary(), and displays the contents sorted by key. if __name__ == '__main__': words = input().split() your_dictionary = build_dictionary(words) sorted_keys = sorted(your_dictionary.keys()) for key in sorted_keys: print(key + ': ' + str(your_dictionary[key])) ``` ### Example Output: ``` the output is: Mark: 1 hey: 1 hi: 2 mark: 1 ``` ### Explanation: The code is a framework for creating a word frequency counter. Users will input a sentence or list of words, which is split into individual words. The `build_dictionary` function will count how frequently each word appears and store this information in a dictionary. The words and their frequencies are then printed in alphabetical order.
Transcribed Image Text:**Lab Activity: Word Frequencies (Dictionaries)** **Objective**: To build a dictionary that counts the frequency of each word in a given list of words. ### Provided Code Template: ```python def build_dictionary(words): # The frequencies dictionary will be built with your code below. # Each key is a word string and the corresponding value is an integer # indicating that word's frequency. ''' Type your code here (remove the "pass" statement below) ''' pass # The following code asks for input, splits the input into a word list, # calls build_dictionary(), and displays the contents sorted by key. if __name__ == '__main__': words = input().split() your_dictionary = build_dictionary(words) sorted_keys = sorted(your_dictionary.keys()) for key in sorted_keys: print(key + ': ' + str(your_dictionary[key])) ``` ### Example Output: ``` the output is: Mark: 1 hey: 1 hi: 2 mark: 1 ``` ### Explanation: The code is a framework for creating a word frequency counter. Users will input a sentence or list of words, which is split into individual words. The `build_dictionary` function will count how frequently each word appears and store this information in a dictionary. The words and their frequencies are then printed in alphabetical order.
Implement the `build_dictionary()` function to build a word frequency dictionary from a list of words. **Example 1:** If the words list is: ``` ["hey", "hi", "Mark", "hi", "mark"] ``` The dictionary returned from calling `build_dictionary(words)` is: ``` {'hey': 1, 'hi': 2, 'Mark': 1, 'mark': 1} ``` **Example 2:** If the words list is: ``` ["zyBooks", "now", "zyBooks", "later", "zyBooks", "forever"] ``` The dictionary returned from calling `build_dictionary(words)` is: ``` {'zyBooks': 3, 'now': 1, 'later': 1, 'forever': 1} ``` The main code builds the word list from an input string, calls `build_dictionary()` to build the dictionary, and displays the dictionary sorted by key value. **Example Input:** ``` hey hi Mark hi mark ``` **Output:** ``` Mark: 1 hey: 1 hi: 2 mark: 1 ```
Transcribed Image Text:Implement the `build_dictionary()` function to build a word frequency dictionary from a list of words. **Example 1:** If the words list is: ``` ["hey", "hi", "Mark", "hi", "mark"] ``` The dictionary returned from calling `build_dictionary(words)` is: ``` {'hey': 1, 'hi': 2, 'Mark': 1, 'mark': 1} ``` **Example 2:** If the words list is: ``` ["zyBooks", "now", "zyBooks", "later", "zyBooks", "forever"] ``` The dictionary returned from calling `build_dictionary(words)` is: ``` {'zyBooks': 3, 'now': 1, 'later': 1, 'forever': 1} ``` The main code builds the word list from an input string, calls `build_dictionary()` to build the dictionary, and displays the dictionary sorted by key value. **Example Input:** ``` hey hi Mark hi mark ``` **Output:** ``` Mark: 1 hey: 1 hi: 2 mark: 1 ```
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