Question

A dictionary courses lists the Harvard summer school classes a student is taking, along with information about the classes. For example, courses = { "CSCI-S7" : { "full_name" : "Intro to cs with Python", "instructors" : [ "Henry", "Dimitri" ], "tas" : ["Amia", "Ben" "Zuzanna"), "num homeworks" : 6, "num_exams" : 2 }, "FREN-SAA" : { "name" : "Beginning French I", }, } Write a loop that computes the total number of homeworks that the student has in all of their classes. For 2 points of extra credit, write this in one line using the function sum and a list comprehension.

Answer 1

Required line:

total_no_homeworks=sum([sum([m for l,m in v.items() if (l=="num_homeworks") ]) for k,v in courses.items()])

complete Source Code:

courses={"CSCI-S7":
           {"full_name":"Intro to CS with python",
           "instructors":["Henry","Dimitri"],
           "tas":["Amia","Ben","Zuzanna"],
           "num_homeworks":6,
           "num_exams":2
           },
       "FREN-SAA":
           {"full_name":"Beginning French I",
           "instructors":["David","Kelvin"],
           "tas":["Rambo","Tuny","Monato"],
           "num_homeworks":4,
           "num_exams":5
           }  
       }

total_no_homeworks=sum([sum([m for l,m in v.items() if (l=="num_homeworks") ]) for k,v in courses.items()])
print(total_no_homeworks)

7 main.py 1 courses={"CSCI-57": 2 {"full_name":"Intro to cs with python", 3 "instructors": [ "Henry","Dimitri"], 4 "tas": ["Amia", "Ben", "Zuzanna"], 5 "num_homeworks":6, 6 "num_exams":2 }, 8- "FREN-SAA": {"full_name":"Beginning French I", 10 "instructors": [ "David","Kelvin"], 11 "tas":["Rambo", "Tuny", "Monato"], 12 "num_homeworks":4, 13 "num_exams":5 14 15 9 } بها 16 17 total_no_homeworks=sum([sum([m for 1,m in v.items() if (1=="num_homeworks") ]) for k,v in courses.items()]) 18 print(total_no_homeworks) 19 input 10 ...Program finished with exit code o Press ENTER to exit console. I