Finding The Percentage (HackerRank)

 The provided code stub will read in a dictionary containing key/value pairs of name:[marks] for a list of students. Print the average of the marks array for the student name provided, showing 2 places after the decimal.

Example

The query_name is 'beta'. beta's average score is .

Input Format

The first line contains the integer , the number of students' records. The next  lines contain the names and marks obtained by a student, each value separated by a space. The final line contains query_name, the name of a student to query.

Constraints

Output Format

Print one line: The average of the marks obtained by the particular student correct to 2 decimal places.

# Solution:--

if __name__ == '__main__':

    n = int(input())

    student_marks = {}

    for _ in range(n):

        name, *line = input().split()

        scores = list(map(float, line))

        student_marks[name] = scores

    query_name = input()

    

    for key,value in students_marks.itmes():

        if query_name==key:

            sum=0

            count=0

            for i in value  :

                sum+=i

                count+=1

            average=sum/count

            print("{:.2f}".format(average))

##Single asterisk(*) as used in function declaration allows variable number of arguments passed from calling environment. Inside the function it behaves as a tuple.