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:

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