Collections.namedtuple() in Python

06 Feb Collections.namedtuple() in Python

Hello Friends, How are you? Today I am going to solve the HackerRank Collections.namedtuple() Problem in Python with a very easy explanation. In this article, you will get one or more approaches to solving this problem. So let’s start- {tocify} $title={Table of Contents} 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.

>>> 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 {codeBox}

>>> 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 {codeBox}

Dr. John Wesley has a spreadsheet containing a list of student’s IDs, marks, classs and name. Your task is to help Dr. Wesley calculate the average marks of the students. Average = Sum of all marks/Total Students 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.) 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. Print the average marks of the list corrected to 2 decimal places.

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 {codeBox}

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 {codeBox}

78.00 {codeBox}

81.00 {codeBox}

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. Approach I: Collections.namedtuple() HackerRank Python Solution

# ========================
# Information
# ======================== # Name: Collections.namedtuple() in Python HackerRank
# Direct Link: https://www.hackerrank.com/challenges/py-collections-namedtuple/problem
# Difficulty: Easy
# Max Score: 20
# Language: Pypy 3 # ========================
# Solution Start
# ======================== #Collections.namedtuple() in Python - Hacker Rank Solution from collections import namedtuple n = int(input())
fields = input().split() total_marks = 0
for _ in range(n): students = namedtuple('student', fields) MARKS, CLASS, NAME, ID = input().split() student = students(MARKS, CLASS, NAME, ID) total_marks += int(student.MARKS)
print('{:.2f}'.format(total_marks / n)) #Collections.namedtuple() in Python - Hacker Rank Solution END
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