Question 24 Consider students - {'Semester 1' {'Ryan':20, 'Mercy':25}, 'Semester 2': {'Justin':21, 'Andrea':26}} .What command should be used to obtain the count of entries? len(students) size(students) students.len() students.size()) Question 25 How do you obtain a list of tuples of key-value pairs in a dictionary dict? dict.get(key, default) dict.items() dict.keys) dict.valuesO

Question 24 Consider students - {'Semester 1' {'Ryan':20, 'Mercy':25}, 'Semester 2': {'Justin':21, 'Andrea':26}} .What command should be used to obtain the count of entries? len(students) size(students) students.len() students.size()) Question 25 How do you obtain a list of tuples of key-value pairs in a dictionary dict? dict.get(key, default) dict.items() dict.keys) dict.valuesO

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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import json, datetime, csvfrom pprint import pprint Question 3 - Using the cleaned list of lists from question 1, create a dictionary of dictionaries where each key in the outer dictionary is an author whose last name starts with the letter 'S'. - Each inner dictionary should contain the number of books that author has written as 'Number of Books' - It should contain the earliest book title for that author based on year with the key 'First Book' - Finally it should contain the latest book title for that author based on year with the key 'Last Book' - If an author has only one book put the same title in both places - Return the dictionary of dictionaries def author_history(cleaned_list): Args: cleaned_list (list) Returns: dictionary of dictionaries Output: {'SafranFoer,Jonathan': {'First Book': 'ExtremelyLoudandIncrediblyClose', 'Last Book': 'ExtremelyLoudandIncrediblyClose',…
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