you will write and read your class SalaryEmployee to and from a file salary_employee.csv in format of comma separates values . You must use your own my_join and my_split functions. 

Program menu as below:

(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

With menu option 1 you will read employee names and their salary to objects.
With menu option 2 you will write all objects to csv-file.
With menu option 3 you will read objects from csv-file.
With menu option 4 you will print objects and their values in a format like: Id: 1 Name: Jane Doe Salary: 5555.

With menu option 0 you will quit the execution of program.

Your job is to code for menu options 2 and 3.

Write employees to file:

make sure that file salary_employee.csv is empty,
go thru salary employees, add its attributes to a list and use my_join to make csv-string from that list,
complete string with newline and write it to file,
when all employees are handled, remember to close the filehandle,
add the following code to the end: print(len(salary_employees) ," employee(s) added to salary_employee.csv").

Read employees from file:

open file salary_employee.csv for reading,
go thru the file line by line,
strip newline and use my_split to make attribute list from string,
make SalaryEmployee object and add it to salary_employees list,
close file when all lines are read,
add following code to the end: print(len(salary_employees) ," employee(s) read from salary_employee.csv").

**Expected output**

(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

Please select one: 1
Please enter employee name (0 to quit):Jane Doe
Please enter salary:5555
Please enter employee name (0 to quit):John Johnson
Please enter salary:4567
Please enter employee name (0 to quit):Richard Roe
Please enter salary:3636
Please enter employee name (0 to quit):0
(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

Please select one: 2
3  employee(s) added to salary_employee.csv
(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

Please select one: 4
Id: 1 Name: Jane Doe Salary: 5555
Id: 2 Name: John Johnson Salary: 4567
Id: 3 Name: Richard Roe Salary: 3636
(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

Please select one: 3
3  employee(s) read from salary_employee.csv
(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

Please select one: 4
Id: 1 Name: Jane Doe Salary: 5555
Id: 2 Name: John Johnson Salary: 4567
Id: 3 Name: Richard Roe Salary: 3636
(1) Add employee to employees
(2) Write employees to file
(3) Read employees from file
(4) Print employees
(0) Quit

Please select one: 0
Service shutting down, thank you.

code:

def my_split(sentence, sep):
 lst = []
 tmp = ''
 for c in sentence:
   if c == sep:
       lst.append(tmp)
       tmp = ''
   else:
       tmp += c
 if tmp:
   lst.append(tmp)

  return(lst)

def my_join(lst,sep):
 mystr = ''
 for elem in lst[0:-1]:
     mystr += str(elem) + str(sep)
 mystr += str(lst[-1])

  return(mystr)

class Employee:
   def __init__(self, id, name):
       self.id = id
       self.name = name

class SalaryEmployee(Employee):
   def __init__(self, id, name, monthly_salary):
       super().__init__(id, name)
       self.monthly_salary = monthly_salary

    def calculate_payroll(self):
       return self.monthly_salary
   

while True:
   print("(1) Add employee to employees(2) Write employees to file(3) Read employees from file(4) Print employees(0) Quit")
   
selection = int(input("Please select one: "))
   
if selection == 1:
       salary_employees = []
       name = " "
       id = 1
       while name != '0':
         name = str(input("Please enter employee name (0 to quit):"))
         if name != '0':
           try:
             salary = int(input("Please enter salary:"))
           except:
             salary = 0  
          salary_employees.append(SalaryEmployee(id,name,salary))
           id += 1

### put your code here ###

      elif selection == 4:
       for employee in salary_employees:
           print("Id:",employe.id, "Name:", employee.name, "Salary:", employee.monthly_salary)

      elif selection == 0:
       print("Service shutting down, thank you.")
       break
     else:
       print("Incorrect selection.")