Question

Design and implement a class Country that stores the name of the country, its population, its area, and the population density (i.e., people per square kilometer (or mile). In other words, there are four major methods in this class (i.e., get country name, get area information, get population information, and get population density information). Then, write a test file that reads data.txt and prints the following three tasks by leveraging methods from the Country() class.  The country with the largest area. The country with the largest population.  The country with the largest population density You should turn in TWO Python files in this question. One is a Country class file and the other is the test program that leverages the methods from the Country()class and print the above three requests. You could leverage set() to store country information and do the operations.

Answer 1

See explaination

Step-by-step explanation:

Make use of Python programming language.

File: Country.py

class Country:

def __init__(self, n="", p=0, a=0):

""" Constructor """

self.name = n

self.population = p

self.area = a

self.pDensity = self.population / self.area

def getCountryName(self):

""" Getter method """

return self.name

def getPopulation(self):

""" Getter Method """

return self.population

def getArea(self):

""" Getter Method """

return self.area

def getPDensity(self):

""" Getter Method """

return self.pDensity

File: CountryInfo.py

from Country import *

# Opening file for reading

with open("d:\\Python\\data.txt", "r") as fp:

# List that hold countries

countryInfo = []

# Processing file line by line

for line in fp:

# Stripping spaces and new lines

line = line.strip()

# Splitting and creating object

cols = line.split('\t')

cols[1] = cols[1].replace(',', '')

cols[2] = cols[2].replace(',', '')

c = Country(cols[0], int(cols[1]), float(cols[2]))

countryInfo.append(c)

# Processing each countryInfo

largestPop = 0

largestArea = 0

largestPDensity = 0

# Iterating over list

for i in range(len(countryInfo)):

# Checking population

if countryInfo[i].getPopulation() > countryInfo[largestPop].getPopulation():

largestPop = i;

# Checking area

if countryInfo[i].getArea() > countryInfo[largestPop].getArea():

largestArea = i;

# Checking population density

if countryInfo[i].getPDensity() > countryInfo[largestPop].getPDensity():

largestPDensity = i;

print("\\Largest population: " + countryInfo[largestPop].getCountryName())

print("\\Largest area: " + countryInfo[largestArea].getCountryName())

print("\\Largest population density: " + countryInfo[largestPDensity].getCountryName() + "\\")

Please go to attachment for sample program run