Collections.namedtuple() in Python - HackerRank Solution
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_product 11
Code 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 Y
Task :
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 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 :
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 5
Sample Output :
TESTCASE 01
78.00
TESTCASE 02
81.00
Explanation :
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 - Hacker Rank Solution # Python 3 # Enter your code here. Read input from STDIN. Print output to STDOUT # Collections.namedtuple() in Python - Hacker Rank Solution START import collections n = int(input()) scol = ','.join(input().split()) Student = collections.namedtuple('Student',scol) sum = 0 for i in range(n): row = input().split() student = Student(*row) sum += int(student.MARKS) print(sum/n) # Collections.namedtuple() in Python - Hacker Rank Solution END
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