Collections.namedtuple() HackerRank Solution In Python

Problem

_{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_product11

Code 02

>>> from collections import namedtuple>>> Car = namedtuple('Car','Price Mileage Colour Class')>>> xyz = Car(Price = 100000, Mileage = 30, Colour = 'Cyan', Class = 'Y')>>> print xyzCar(Price=100000, Mileage=30, Colour='Cyan', Class='Y')>>> print xyz.ClassY

Task

Dr. John Wesley has a spreadsheet containing a list of student’s IDs, marks, class and name.

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 N, the total number of students.
The second line contains the names of the columns in any order.
The next N lines contains the marks, IDs, name and class, under their respective column names.

Constraints

0 < N ≤ 100

Output Format

Print the average marks of the list corrected to 2 decimal places.

Sample Input

Testcae 01

5ID         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

5MARKS      CLASS      NAME       ID        92         2          Calum      1         82         5          Scott      2         94         2          Jason      3         55         8          Glenn      4         82         2          Fergus     5

Sample Output

TESTCASE 01

78.00

TESTCASE 02

81.00

Explanation

TESTCASE 01

Average = (97 + 50 + 91 + 72 + 80)/5

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 – Collections.namedtuple() In Python

n = int(input())cols = input().split()details = [input().split() for _ in range(n)]mark = cols.index("MARKS")sum = 0for i in details:    sum += int(i[mark])    print(round(sum/n, 2))