Question

Assignment: USING PYTHON

Expected submission: TWO (2) Python files, main.py and HelperClasses.py Make a file called HelperClasses and create a class inside it called Helpers Inside Helpers, create 8 static methods as follows:

1.) Max, Min, Standard_Deviation, Mean
a.) Each of these should take a list as a parameter and return the calculated

value

2.) Bubble

a.) This should take a list as a parameter and return the sorted list 3.) Median

a.) This should take a list as a parameter, should call Bubble to sort the list, then return the median of the list

4.) Mode
a.) This should take a list as a parameter and return the number that is in the

list the most

5.) File_Checking

a.) This should take a string as a parameter and return if a file with that name exists

Inside main, you will generate a list of 50 random numbers from 1-10. Then you will ask the user which function they want to user, output the return value, and loop until they decide to quit.

Do not use: Max, Min, Mean, Mode, Sort, stdev functions built into python

Answer 1

Main.py:

from HelperClasses import HelperClasses

from collections import Counter

import random

def askUser():      #ask user for input to perform operation

    print("1. Max\n2. Min\n3. Standard_Deviation\n4. Mean\n5. Bubble\n6. Mode\n7. File Checking")

    inp = input("Function to use? Enter corresponding no.[1-7]: ")

    return int(inp)

def switch(arg, list): #to call appropriate function

    switcher = {

        1: HelperClasses.max(list),

        2: HelperClasses.min(list),

        3: HelperClasses.Standard_Deviation(list),

        4: HelperClasses.Mean(list),

        5: HelperClasses.Bubble(list),

        6: HelperClasses.Mode(list),

    }

    if arg == 7:

        str = input("File name? :")

        return HelperClasses.File_Checking(str)

    else:

        return switcher.get(arg, "Invalid Code!")

def ask(list): #ask repeatatively

    r = input("Do you want to perform another operation? [Enter Y for yes anything other for no]: ")

    if r.upper() == "Y":

        print(switch(askUser(), list))

        ask(list)

    else:

        print("Quitting...!")

def main(): #main block

    list = [random.randint(1,10) for i in range(50)]    #random generate 50 nums 1-10

    print(list) #print the list

    print(switch(askUser(), list)) #frst operation

    ask(list)   #ask repeatatively

if __name__ == "__main__":

    main()

HelperClasses.py:

from collections import Counter

class HelperClasses:

    @staticmethod

    def max(list):

        maxima = -99999999

        for i in list:

            if maxima < i:

                maxima = i

        return maxima

    @staticmethod

    def min(list):

        minima = 99999999

        for i in list:

            if minima > i:

                minima = i

        return minima

    @staticmethod

    def Mean(list):

        sum, count = 0, 0

        for i in list:

            sum+=i

            count=count+1

        return float(sum/count)

    @staticmethod

    def Standard_Deviation(list):

        m = HelperClasses.Mean(list)

        sum, count = 0, 0

        for i in list:

            sum +=(m-i)*(m-i)

            count=count+1

        return pow(float(sum/count), 0.5)

    @staticmethod

    def Bubble(list):

        arr = list

        n = len(list)

   

        for i in range(n):

            for j in range(0, n-i-1):

                if arr[j] > arr[j+1] :

                    arr[j], arr[j+1] = arr[j+1], arr[j]

        return arr

    @staticmethod

    def Mode(list):

        n = len(list)  

        data = Counter(list)

        get_mode = dict(data)

        mode = [k for k, v in get_mode.items() if v == max(data.values())]

       

        if len(mode) == n:

               get_mode = "No mode found"

        else:

               get_mode = "Mode is / are: " + ', '.join(map(str, mode))   

        return get_mode

    @staticmethod

    def File_Checking(str):

        try:

            f = open(str, mode='r')

        except IOError:

                return "Not Exist"

        if f:

            f.close()

            return "Exist"

OUTPUT:

a Console 1/A In [55]: runfile('C:/Users/achar/main.py', wdir='C:/Users/achar') [1, 3, 10, 2, 5, 7, 2, 9, 10, 10, 8, 7, 5, 10, 3, 10, 9, 9, 2, 7, 3, 1, 3, 7, 4, 9, 3, 10, 8, 1, 3, 6, 10, 10, 3, 4, 3, 1, 10, 9, 8, 2, 1, 3, 5, 2, 5, 10, 6, 6] 1. Max 2. Min 3. Standard_Deviation 4. Mean 5. Bubble 6. Mode 7. File Checking Function to use? Enter corresponding no. [1-7]: 1 10 Do you want to perform another operation? [Enter Y for yes anything other for no]: y 1. Max 2. Min 3. Standard_Deviation 4. Mean 5. Bubble 6. Mode 7. File Checking Function to use? Enter corresponding no. [1-7]: 2 Do you want to perform another operation? [Enter y for yes anything other for no]: y 1. Max 2. Min 3. Standard_Deviation 4. Mean 5. Bubble 6. Mode 7. File Checking Function to use? Enter corresponding no.[1-7]: 3 3.207802986469088 Do you want to perform another operation? [Enter Y for yes anything other for no]: y 1. Max 2. Min 3. Standard_Deviation 4. Mean

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O Console 1/A Do you want to perform another operation? [Enter Y for yes anything other for no]: y 1. Max 2. Min 3. Standard_Deviation 4. Mean 5. Bubble 6. Mode 7. File Checking Function to use? Enter corresponding no. [1-7]: 7 File name? :info.txt Exist Do you want to perform another operation? [Enter Y for yes anything other for no]: y 1. Max 2. Min 3. Standard_Deviation 4. Mean 5. Bubble 6. Mode 7. File Checking Function to use? Enter corresponding no. [1-7]: 7 File name? : jbl.txt Not Exist Do you want to perform another operation? [Enter Y for yes anything other for no]: n Quitting...!