Question

USING PYTHON. Avoid using built in functions if possible. I'm a beginner so keep it simple please.

''' Q5. Design a function that takes a dictionary where for each entry,
the key is a course as a string and the value is a list of related courses
as a list of strings. The function should create and return a new dictionary from
the given dictionary where each of the course names in the lists of values
is a key in the new dictionary and the value for each key in the new dictionary is
a list of the courses that are related to that key in sorted order.
  
Example.
if data is {'CSC 111': ['MATH 12'], 'CSC 116': ['CSC 110', 'CSC 111'],'CSC 115': ['CSC 110', 'CSC 111'], 'CSC 106': []}
then the function should return: {'MATH 12': [ 'CSC 111'], 'CSC 110': [ 'CSC 115', 'CSC 116'],
'CSC 111': [ 'CSC 115', 'CSC 116']}

Answer 1

Given below is the code for the question. PLEASE MAKE SURE INDENTATION IS EXACTLY AS SHOWN IN IMAGE.
Please do rate the answer if it helped. Thank you.

def process(dic):
   newdic = {}
   for k in dic:
       values = dic[k]
       for v in values:
           if v not in newdic:
               newdic[v] = [k]
           else:
               newdic[v].append(k)
  
   #now sort the values list
  
   for k in newdic:
       newdic[k].sort()
  
   return newdic

#testing the function
data = {'CSC 111': ['MATH 12'], 'CSC 116': ['CSC 110', 'CSC 111'],'CSC 115': ['CSC 110', 'CSC 111'], 'CSC 106': []}
print(process(data))

output
======
{'MATH 12': ['CSC 111'], 'CSC 110': ['CSC 115', 'CSC 116'], 'CSC 111': ['CSC 115', 'CSC 116']}