I am having trouble with the update_employee and search_by_ssn functions in my code. When I ran my code last week, it worked perfectly. This week, I added export_employee and import_employee, but left everything else pretty much the same. What am I doing wrong? Here is my code.

employees = [] #creates a new list titled employee_list

employee_count = 0 #counter to track how many employees have been entered

def export_employee(employee):

fopen = open('employeedata.txt','a')

for i in employee:

fopen.write(i+',')

fopen.write(' ')

fopen.close()

def import_employee(employees):

temp = []

fopen = open('employeedata.txt','r')

for line in fopen:

line = line.strip()

if len(line) != 0:

line = line.split(',')

temp.append(line)

fopen.close()

return temp

employees = import_employee('employeedata.txt').copy()

for employee in employees:

employee_count +=1

def add_employee(): #defining a function to add employees

employee_name = input (' Enter employee name: ')

employee_phone = input ('Enter employee phone number, format (xxx)xxx-xxxx: ')

employee_ssn = input ('Enter employee SSN using no spaces or special characters: ')

employee_email = input ('Enter employee email address: ')

employee_salary = input('Enter employee salary: ')

employee_info = [] #creates a new list titled employee_info

employee_info.append(employee_name) #using the input information to append the employee info list

employee_info.append(employee_phone)

employee_info.append(employee_ssn)

employee_info.append(employee_email)

employee_info.append(employee_salary)

export_employee(employee)

return employee_info

def view_all_employees (employees): #defining a function to view all employees

if len(employees) == 0:

print (' There are no employees ') #tells the user that no employees are in the system

else:

print (' ')

#a for loop that will print out the employee information, by index location, until all employees have been reported

for employee in employees:

print(employee[0].center(45,'-')) #center-align with '-' padding

print('\tPhone:',employee[1])

print('\tSSN:', employee[2])

print('\tEmail:', employee[3])

print('\tSalary:','$'+employee[4]) #adding a '$' before the amount

print('-'*45) #'-' padding to match column width for first line

print(' ')

def search_by_ssn(employees, ssn): #define function to search by SSN

for index, employee in enumerate(employees):

if (employee[2] == ssn):

return index

return None

def update_employee(employees, index): #define function to update employee information

employees[index][0] = input(' Enter employee name: ')

employees[index][1] = input('Enter employee phone number: ')

employees[index][2] = input('Enter employee SSN: ')

employees[index][3] = input('Enter employee email: ')

employees[index][4] = input('Enter employee salary: ')

#a while loop to continually prompt the user to chose between adding and viewing employees

#loop will continue until the user chooses to exit the system by entering "3"

while True:

print ()

print ('There are', employee_count, 'employees currently in the system') #tells the user how many employees are in the system

print ('What would you like to do?')

print ()

print ('1. Add Employee 2. View All Employees 3. Search by SSN 4. Update employee info 5. Exit') #instructs user to make a selection

choice = int(input(' Enter a choice (1/2/3/4/5): '))

if choice == 1: #if the user selects 1, the system will run the add_employee function

info = add_employee()

employees.append(info)

employee_count +=1

print (" Employee's information added successfully ")

elif choice == 2: #if the user selects 2, the system will run the view_all_employees function

view_all_employees(employees)

elif choice == 3: #if user selects 3, the system will prompt for SSN and run search_by_ssn function

employee_ssn = input('Enter employee SSN: ')

index = search_by_ssn(employees, employee_ssn)

if(index is None):

print('Employee not found.')

else:

view_all_employees([employees[index]])

elif choice == 4: #if user selects 4, the system will prompt user for updated information for each line of information

employee_ssn = input('Enter employee SSN: ')

index = search_by_ssn(employees, employee_ssn)

update_employee(employees, index)

print('Employee successfully updated')

elif choice == 5: #if the user selects 5, the system prints a goodbye message and exits the program

print (' Goodbye')

break #breaks the loop once user selects 3

else: #if the user selects anything other than the available choices, the system will prompt the user to try again

print (' Error This is an invalid choice. Please try again... ')