Question

Python 5. Write a function named grade_components that has one parameter, a dictionary. The keys for the dictionary are strings and the values are lists of numbers. The function should create a new dictionary where the keys are the same strings as the original dictionary and the values are tuples. The first entry in each tuple should be the weighted average of the non-negative values in the list (where the weight was the number in the 0 position of the original list). The second entry in the tuple should be the percent of the values in the list (excluding the weight value) that are non-negative.

6. Write a function named compute_grade that has two parameters, both dictionaries. The keys for the first dictionary are strings (grade categories) and the values are lists of numbers (category weights and scores, where -1 indicates an assignment that has not yet been graded). The second keys for the The second dictionary key values are letters and the values are tuples with the lowest and highest grade that would match the key letter grade. Your function should return a tuple with 3 values. The first value in the tuple is the total grade. This is computed as the grade out of the full 100% available for the semester. Ex: if the grades for all completed assignments have been 100%, then the returned value would be 100%. The second value in the tuple is the current grade. This is computed as the grade out of the work completed (for this calculation, you will need to use the percent of the work completed in each category). Ex: if only 60% of the class assignments have been completed and the grades for each assignment have been 100, then the returned value would be 60%. The third value in the tuple is the letter grade based on the current grade.

Answer 1

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Code:

#This function has one parameter, a dictionary.
#The keys for the dictionary are strings and the values are lists of numbers.
def grade_components(data):
result={} #New dictionary that will hold results
#looping for every key value pair
for key in data:
listOfValues=data[key] #getting list of values for the current key
weight=listOfValues[0] #getting weight which is the first value
listOfValues.pop(0) #removing wieght from the list
positives=0 #initially positives are zero
total=0 #total number in list are also zero
weightedAverage=0 # initializing weightedAverage to zero
for value in listOfValues: #looping for each value in list
if value>=0: #if value is greater than or equal to 0 then taking it as positive
positives=positives+1 #incrementing positives
weightedAverage=weightedAverage+weight*value #adding weight*value to weighted average
total=total+1 #incrementing total
weightedAverage=weightedAverage/(positives*weight)#calculating weighted average
result[key]={weightedAverage,(positives/total)*100} #setting tuple for the key in new dictionary.First value is average weighted key and second is percentage of positive values
return result #returning result

data={"stud1":[100,48,66,-97,78],"stud2":[50,45,-47,37]}
print(grade_components(data))

Code screenshot:

Output: