Question

2. Write a standalone function partyVolume() that takes accepts one argument, a string containing the name of a file. The objective of the function is to determine the a Volume object that is the result of many people at a party turning the Volume up and down. More specifically:

Answer 1

Answer:

The Python code is given below with appropriate comments

Explanation:

#required method, assuming Volume class is defined and is accessible

def partyVolume(filename):

   #opening file in read mode, assuming file exists

   file=open(filename,'r')

   #reading initial volume

   initial=float(file.readline())

   #creating a Volume object with initial volume

   v=Volume(initial)

   #looping through rest of the lines in file

   for line in file.readlines():

       #removing trailing/leading white spaces/newlines and splitting line by white

       #space to get a list of tokens

       line=line.strip().split(' ')

       #ensuring that length of resultant list is 2

       if len(line)==2:

           #reading first value as direction (U or D)

           dir=line[0].upper()

           #reading second value as float value

           value=float(line[1])

           if dir=='U':

               #turning volume up

               v.up(value)

           elif dir=='D':

               #turning volume down

               v.down(value)

   #closing file, saving changes

   file.close()

   #returning volume

   return v