Question

Python Please

Define a class that has one data attribute of type float. The initializer does not accept an argument, however, it initializes the data attribute to zero. Include in class the following methods:

1. func that will accept as two arguments. The first argument a value of float type and the second argument if string. The function will perform the following depending on the string argument:

a. if string is '+', the first argument will be added to the data attribute.

b. if string is '-', the first argument will be subtracted from the data attribute.

c. if string is '*', the data attribute will be equal to the data attribute multiplied by first argument.

d. if string is '/', the data attribute will be equal to the data attribute divided by first argument.

e. if string is '^', the data attribute will be equal to the data attribute raised to the power of the first argument.

2. _ _init_ _ method

3. _ _str_ _ that will return the data attribute as a string

4. An accessor that will return the data attribute

Answer 1

class Operations:
    #constructor
    def __init__(self):
        self.data=0.0
    #func accepts 2 arguments
    def func(self,value,string):
        if string=='+':
            self.data+=value
        elif string=='-':
            self.data-=value
        elif string=='*':
            self.data*=value
        elif string=='/':
            self.data/=value
        elif string=='^':
            self.data**=value
    #accessor
    def getData(self):
        return self.data
    #str() prints string representation of object
    def __str__(self):
        return str(self.data)
#testing class
#create object for class
operation=Operations()
operation.func(4.5,"+")
operation.func(3.4,"*")
print(operation) #invokes str()

Output