Can you help me$,$ please, modify my code?

# creating a class called GradesFile

class GradesFile:

# creating a constructor

def $\_\_$init$\_\_($self$,$ filename$)$:

self.$\_\_$filename $=$ filename

# getter for filename

def get$\_$filename$($self$)$:

return self.$\_\_$filename

# setter for filename

def set$\_$filename$($self$,$ filename$)$:

self.$\_\_$filename $=$ filename

# function to calculate average

def calculateAverage$($self$)$:

# using try and except to handle possible exceptions

try:

# opening the file

infile $=$ open$($self$.\_\_$filename, $\text{'}$r$\text{'})$

# initializing the total and count

total $=0$

count $=0$

# using a for loop to read the file

for line in infile:

# converting the line to float and adding it to the total

total $+=$ eval$($line$)$

# incrementing the count

count $+=1$

# calculating the average

average $=$ total $/$ count

# returning the average

return f$\text{'}\{$average:$\mathrm{.}2$f$\}\text{'}$

except IOError:

# printing an error message if the file is not found

print$(\text{'}$Error: File not found'$)$

except ValueError:

print$(\text{'}$Error: Invalid value'$)$

# main function

def main$()$:

# using try and except to handle possible exceptions

try:

# opening the file

file $=$ open$(\text{'}$Grades$.$txt$\text{'},\text{'}$w$\text{'})$

# enter grades until the user enters $-1$

print$(\text{'}$Enter grades, enter $-1$ to quit'$)$

grade $=$ int$($input$(\text{'}$Enter grade: $\text{'}))$ # getting the first grade

# using a while loop to get the grades

while grade $!=-1$:

# writing the grade to the file

file.write$($str$($grade$)+\text{'}$

$\text{'})$

grade $=$ int$($input$(\text{'}$Enter grade: $\text{'}))$

# closing the file

file.close$()$

# creating an object of the GradesFile class

gradesFile $=$ GradesFile$(\text{'}$Grades$.$txt$\text{'})$

average $=$ gradesFile.calculateAverage$()$

print$(\text{'}$Average:$\text{'},$ average$)$

# handling possible exceptions

except ValueError:

# printing an error message if the user enters a non$-$integer value

print$(\text{'}$Error: Invalid value.$\text{'})$

except:

print$(\text{'}$Error: An error occurred.$\text{'})$

# calling the main function

main$()```$

class GradesFile:

# creating a constructor

def $\_\_$init$\_\_($self$,$ filename$)$:

self.$\_\_$filename $=$ filename

# getter for filename

def get$\_$filename$($self$)$:

return self.$\_\_$filename

# setter for filename

def set$\_$filename$($self$,$ filename$)$:

self.$\_\_$filename $=$ filename

# function to calculate average

def calculateAverage$($self$)$:

# using try and except to handle possible exceptions

try:

# opening the file

infile $=$ open$($self$.\_\_$filename, $\text{'}$r$\text{'})$

# initializing the total and count

total $=0$

count $=0$

# using a for loop to read the file

for line in infile:

# converting the line to float and adding it to the total

total $+=$ eval$($line$)$

# incrementing the count

count $+=1$

# calculating the average

average $=$ total $/$ count

# returning the average

return f$\text{'}\{$average:$\mathrm{.}2$f$\}\text{'}$

except IOError:

# printing an error message if the file is not found

print$(\text{'}$Error: File not found'$)$

except ValueError:

print$(\text{'}$Error: Invalid value'$)$

# main function

def main$()$:

# using try and except to handle possible exceptions

try:

# opening the file

file $=$ open$(\text{'}$Grades$.$txt$\text{'},\text{'}$w$\text{'})$

# enter grades until the user enters $-1$

print$(\text{'}$Enter grades, enter $-1$ to quit'$)$

grade $=$ int$($input$(\text{'}$Enter grade: $\text{'}))$ # getting the first grade

# using a while loop to get the grades

while grade $!=-1$:

# writing the grade to the file

file.write$($str$($grade$)+\text{'}$

$\text{'})$

grade $=$ int$($input$(\text{'}$Enter grade: $\text{'}))$

# closing the file

file rlnse$()$

$```$