Hackerrank namedtuple solution
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- Updated
- Reading time
- 2 min read
- Length
- 354 words
collections.namedtuple()#
Basically, namedtuples are easy to create, lightweight object types.
They turn tuples into convenient containers for simple tasks.
With namedtuples, you don’t have to use integer indices for accessing members of a tuple.
Example
Code 01
>>> from collections import namedtuple
>>> Point = namedtuple('Point','x,y')
>>> pt1 = Point(1,2)
>>> pt2 = Point(3,4)
>>> dot_product = ( pt1.x * pt2.x ) +( pt1.y * pt2.y )
>>> print dot_product
11Code 02
>>> from collections import namedtuple
>>> Car = namedtuple('Car','Price Mileage Colour Class')
>>> xyz = Car(Price = 100000, Mileage = 30, Colour = 'Cyan', Class = 'Y')
>>> print xyz
Car(Price=100000, Mileage=30, Colour='Cyan', Class='Y')
>>> print xyz.Class
YTask
Dr. John Wesley has a spreadsheet containing a list of student's , , and .
Your task is to help Dr. Wesley calculate the average marks of the students.
Note:
1. Columns can be in any order. IDs, marks, class and name can be written in any order in the spreadsheet.
2. Column names are ID, MARKS, CLASS and NAME. (The spelling and case type of these names won't change.)
Input Format
The first line contains an integer , the total number of students.
The second line contains the names of the columns in any order.
The next lines contains the , , and , under their respective column names.
Constraints
Output Format
Print the average marks of the list corrected to 2 decimal places.
Sample Input
TESTCASE 01
5
ID MARKS NAME CLASS
1 97 Raymond 7
2 50 Steven 4
3 91 Adrian 9
4 72 Stewart 5
5 80 Peter 6 TESTCASE 02
5
MARKS CLASS NAME ID
92 2 Calum 1
82 5 Scott 2
94 2 Jason 3
55 8 Glenn 4
82 2 Fergus 5Sample Output
TESTCASE 01
78.00TESTCASE 02
81.00Explanation
TESTCASE 01
Average =
Can you solve this challenge in 4 lines of code or less?
NOTE: There is no penalty for solutions that are correct but have more than 4 lines.
Solution in Python#
from collections import namedtuple
n, Score = int(input()) , namedtuple('Score',input().split())
scores = [Score(*input().split()).MARKS for i in range(n)]
print("%.2f"% (sum(map(int,scores))/n))
