Write a menu driven program in Python that asks the user to add, display, and search records of employee stored in a binary file. The employee record contains employee code, name and salary. It should be stored in a list object. Your program should pickle the object and save it to a binary file.
Program (employee-database.py)
import pickle
def set_data():
empcode = int(input('Enter Employee code: '))
name = input('Enter Employee name: ')
salary = int(input('Enter salary: '))
print()
#create a list
employee = [empcode,name,salary]
return employee
def display_data(employee):
print('Employee code:', employee[0])
print('Employee name:', employee[1])
print('Salary:', employee[2])
print()
def write_record():
#open file in binary mode for writing.
outfile = open('emp.dat', 'ab')
#serialize the object and writing to file
pickle.dump(set_data(), outfile)
#close the file
outfile.close()
def read_records():
#open file in binary mode for reading
infile = open('emp.dat', 'rb')
#read to the end of file.
while True:
try:
#reading the oject from file
employee = pickle.load(infile)
#display the object
display_data(employee)
except EOFError:
break
#close the file
infile.close()
def search_record():
infile = open('emp.dat', 'rb')
empcode = int(input('Enter employee code to search: '))
flag = False
#read to the end of file.
while True:
try:
#reading the oject from file
employee = pickle.load(infile)
#display record if found and set flag
if employee[0] == empcode:
display_data(employee)
flag = True
break
except EOFError:
break
if flag == False:
print('Record not Found')
print()
#close the file
infile.close()
def show_choices():
print('Menu')
print('1. Add Record')
print('2. Display Records')
print('3. Search a Record')
print('4. Exit')
def main():
while(True):
show_choices()
choice = input('Enter choice(1-4): ')
print()
if choice == '1':
write_record()
elif choice == '2':
read_records()
elif choice == '3':
search_record()
elif choice == '4':
break
else:
print('Invalid input')
#call the main function.
main()Output
Menu 1. Add Record 2. Display Records 3. Search a Record 4. Exit Enter choice(1-4): 1 Enter Employee code: 100 Enter Employee name: Deepak Enter salary: 23000 Menu 1. Add Record 2. Display Records 3. Search a Record 4. Exit Enter choice(1-4): 1 Enter Employee code: 101 Enter Employee name: Saksham Enter salary: 98000 Menu 1. Add Record 2. Display Records 3. Search a Record 4. Exit Enter choice(1-4): 2 Employee code: 100 Employee name: Deepak Salary: 23000 Employee code: 101 Employee name: Saksham Salary: 98000 Menu 1. Add Record 2. Display Records 3. Search a Record 4. Exit Enter choice(1-4): 3 Enter employee code to search: 101 Employee code: 101 Employee name: Saksham Salary: 98000 Menu 1. Add Record 2. Display Records 3. Search a Record 4. Exit Enter choice(1-4): 4 >>>