1. Write a class named Employee that holds the following data about an employee in attributes:...

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Question

1. Write a class named Employee that holds the following data about an employee in attributes: name, ID number, department, a

engineering Computer-Science

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Answer 1

Answer #1

UML Diagram of class Employee

Employee -name:String -ID number:String -department:String -job title:String +__init__(self):None +add(self,String, String, S

Screenshot(employee_App)

$***** from employee import Employee import os.path C. C:\WINDOWS\system32\cmd.exe from os import path Welcome To Employee App$

Program(employee_App.py)

from employee import Employee
import os.path
from os import path

#function display user choices and return correct choice
def getMenu():
    print("OPTIONS:\n-------")
    print('1. Look up an employee\n2. Add a new employee\n3. Change an existing employee\n4. Delete an employee\n0. Quit\n')
    opt=int(input('Enter your choice: '))
    while(opt<0 or opt>4):
        print('ERROR!!!Option should be 0-4.Try again!!!')
        opt=int(input('Enter your choice: '))
    return opt

#Function read data from file and add into dictionary of employee
#Her key is employee id
def readData(employees):
    file1 = open('employees.dat', 'r')
    while True:
        line = file1.readline() .strip()
        if not line:
            break
        line=line.split(',')
        employees[line[1]]=Employee.add(line[0],line[1],line[2],line[3])
    file1.close()

#Search an employee in dictionary using id
#If found display employee details
#Otherwise eroor message
def lookUp(employees):
     id=input('\nEnter employee id for look up: ')
     if id in employees:
         print(employees[id])
     else:
         print(id,' not present!!!')


#Add a new employee in dictionary
#Check already present before add
def addEmployee(employees):
     id=input('\nEnter employee id: ')
     if id in employees:
         print('Already present!!!')
     else:
         name=input('Enter name: ')
         dep=input('Enter department: ')
         title=input('Enter job title: ')
         emp=Employee()
         emp.add(name,id,dep,title)
         employees[id]=emp
         print('Added a new employee!!!')
     return employees

#Update name,department and title of an employee using id
def updateEmployee(employees):
     id=input('\nEnter employee id: ')
     if id in employees:
         name=input('Enter name: ')
         dep=input('Enter department: ')
         title=input('Enter job title: ')
         emp=Employee()
         emp.add(id,name,dep,title)
         employees[id]=emp
         print('Change employee with id ',employees.get(id).ID_number)
     else:
         print(id,' not present!!!')
     return employees

#Remove an employee from dictionary using id
def deleteEmployee(employees):
     id=input('\nEnter employee id to delete ')
     if id in employees:
         employees.pop(id)
         print(id,' removed!!')
     else:
         print(id,' not present!!!')
     return employees

#Write dictionary details into file
def writeData(employees):
    file1 = open('employees.dat', 'w')
    for id in employees:
        file1.write(employees[id].name+','+employees[id].ID_number+','+employees[id].department+','+employees[id].job_title+'\n')
    file1.close()

#Main function
def main():
    #Display header
    print('***** Welcome To Employee App *****\n')
    #Create a dictionary
    employees={}
    #Check file exist
    if path.exists('employees.dat'):
        readData(employees)
    #Call menu
    opt=getMenu()
    #Loop until exit
    while opt!=0:
        #Each options
        if(opt==1):
            lookUp(employees)
        elif opt==2:
           employees=addEmployee(employees)
        elif opt==3:
            employees=updateEmployee(employees)
        elif opt==4:
            employees=deleteEmployee(employees)
        #repetittion
        print()
        opt=getMenu()
    #Write into file
    writeData(employees)

#Start here
if __name__=="__main__":
    main()

Screenshot(employee.py)

class Employee(): #Constructor def _init_(self): self. name= self._ID_number= self._department self._job_title= #Add an e

Program(employee.py)

class Employee():
    #Constructor
   def __init__(self):
      self.__name=""
      self.__ID_number=""
      self.__department=""
      self.__job_title=""
   #Add an employee
   def add(self,name,id,depart,title):
       self.name=name;
       self.ID_number=id
       self.department=depart
       self.job_title=title
    #Search an employee using id
   def search(self,id):
       return self.ID_number==id
   #Setters
   def setName(self,name):
       self.name=name
   def setDepartment(self,depart):
       self.department=depart
   def setTitle(self,title):
       self.job_title=title
    #Display en amployee in string format
   def __str__(self):
       return "Name: %s, ID: %s, Department: %s, Job title: %s"%(self.name,self.ID_number,self.department,self.job_title)

Output

***** Welcome To Employee App *****