Question

Problem 3 (lab4_p3.py) An older, existing campus system has been previously storing student grades in list form with the following format: grades_list - [[student_name_1, student_1_id, student_1_midterm, student_1_final], (student_name_2, student_2_id, student_2_midterm, student 2_final], ... 1 In other words, a list of lists, where each member list contains the student's name, ID, midterm exam grade, and final exam grade. This is a perfectly valid way of storing data, except that when we actually want to use it, we have to rely on arbitrary indices to access each piece of information. Let's say one of the students in our list was [ "Emily Kaldwin", "ek12345", 88, 90] And she was the 76th (or 75th in a zero-based system) student in our grades_list. In order to print her midterm grade, we'd have to do the following: print (grades_list [75] [2] which, for obvious reasons, is inconvenient, has nothing to do with Emily's actual information, and thus is tantamount to hard-coding since 75 and 2 look like random numbers. Write a function, convert_grades_list_to_dictionary, that will take a list of grades similar to the one above as a parameter and converts it into a dictionary of grades. If two students have the same name, your function should assume that this is a mistake, and keep the ID, midterm grade, and final grade of the original entry. The function should retum a dictionary that functions as below: grades_list - [["Emily Kaldwin", "ek12345", 88, 90], ["Sakura Kinomoto", "sk12345", 98, 98], ["Maximilien Robespierre", "mr12345", 76, 89), ("Emily Kaldwin", "ek12345", 100, 10011 grades_dictionary - convert_grades_list_to_dictionary (grades_list) print (grades_dictionary("Sakura Kinomoto" ("NetID"]) + prints "sk12345" print (grades_dictionaryſ "Emily Kaldwin" ("Midterm Grade"]) + prints "88" print (grades_dictionary("Maximilien Robespierre"]["Final Grade"]) + prints "89" The use of dictionaries in this case is a lot more natural, since now we would only need to know the student's name in order to access their information! Hint: Keep in mind that you can nest dictionaries. For example, aDictionary - {"date and time": {"date": "June 25th", "time": 1235) print (aDictionary["date and time" } ["date"]) # prints "June 25th'

all should be solved using the basic data types, assignments, math operations, conditionals, loops, string functions, user defined functions, lists, tuples, file input/output and dictionaries.

Please use python

Answer 1

Code snippet with output below :
The below program takes nested list and converts it to nested dictionaries...
Program assumes this format as given in the question -> student name - ID - mid term - final
Uses len to determine number of lists inside grades_list and loop until that number. In case here it's 4 so loop will run from [0-3].
Checks if student name exists in dictionary inside the loop. If it doesn't then adds the new values to dictionary.

#         Python 3         #

grades_list = [["Emily Kaldwin", "ek12345", 88, 90], ["Sakura Kinomoto","sk12345", 98, 98],
        ["Maximilien Robespierre","mr12345", 76, 89], ["Emily Kaldwin", "ek12345", 100, 100]]

# order of List
# Name - NetID - Mid__term Grade - Final Grade

def convert_grades_list_to_dictionary(grad_list):
    # temp dict
    converted_dict = {}

    # Counts the grad_list and loop until that count
    for x in range(len(grad_list)):
        # Checks if entry exits in dict
        # if not add to the dict
        if not grad_list[x][0] in converted_dict:
            converted_dict[grad_list[x][0]] = { 'NetID' : grad_list[x][1], 'Mid__term Grade' : grad_list[x][2], 'Final Grade' : grad_list[x][3]}
    return converted_dict

grades_dictionary = convert_grades_list_to_dictionary(grades_list)

# From the question

print(grades_dictionary["Sakura Kinomoto"]["NetID"]) # should print "sk12345"
print(grades_dictionary["Emily Kaldwin"]["Mid__term Grade"]) #should print "88"
print(grades_dictionary["Maximilien Robespierre"]["Final Grade"]) #should print "89"

# For Testing purpose   #

print ("\n\nList: \n",grades_list)
print ("\n\nDictionary: \n",grades_dictionary)

# Program Ends #