Problem: Finding the Percentage
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
marks key:value pairs are
‘alpha’:[20, 30, 40]
‘beta’:[30, 50, 70]
query_name=’beta’
The query_name is ‘beta’. beta’s average score is (30+ 50 + 70)/3=50.0 .
Input Format
The first line contains the integer n , the number of students’ records. The next n 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
- 2<=n<=10
- 0<=marks[i]<=100
- lengths of marks arrays=3
Output Format
Print one line: The average of the marks obtained by the particular student correct to 2 decimal places.
Sample Input 0
3 Krishna 67 68 69 Arjun 70 98 63 Malika 52 56 60 Malika
Sample Output 0
56.00
Explanation 0
Marks for Malika are {52,56,60} whose average is (52+56+60)/3=>56
Sample Input 1
2 Harsh 25 26.5 28 Anurag 26 28 30 Harsh
Sample Output 1
26.50
Code:
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()
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