Frosty Elsa Frosty Elsa - 1 month ago 12
Python Question

Sentinel not working properly

def load():
global name
global count
global shares
global pp
global sp
global commission
name=input("Enter stock name OR -999 to Quit: ")
count =0
while name != '-999':
count=count+1
shares=int(input("Enter number of shares: "))
pp=float(input("Enter purchase price: "))
sp=float(input("Enter selling price: "))
commission=float(input("Enter commission: "))
calc()
display()
name=input("\nEnter stock name OR -999 to Quit: ")

def calc():
global amount_paid
global amount_sold
global profit_loss
global commission_paid_sale
global commission_paid_purchase
amount_paid=shares*pp
commission_paid_purchase=amount_paid*commission
amount_sold=shares*sp
commission_paid_sale=amount_sold*commission
profit_loss=(amount_sold - commission_paid_sale) -(amount_paid + commission_paid_purchase)

def display():
print("\nStock Name:", name)
print("Amount paid for the stock: $", format(amount_paid, '10,.2f'))
print("Commission paid on the purchase: $", format(commission_paid_purchase, '10,.2f'))
print("Amount the stock sold for: $", format(amount_sold, '10,.2f'))
print("Commission paid on the sale: $", format(commission_paid_sale, '10,.2f'))
print("Profit (or loss if negative): $", format(profit_loss, '10,.2f'))

def main():
load()
calc()
display()

main()


Sentinel "works" in the sense that it ends the program, but not without outputting the previous stock's data (that is erroneous). I would like the sentinel to immediately stop the program and kick to ">>>" after entering '-999'. Here is what the output looks like:

============= RESTART: C:\Users\ElsaTime\Desktop\answer2.py =============
Enter stock name OR -999 to Quit: M$FT
Enter number of shares: 1000
Enter purchase price: 15
Enter selling price: 150
Enter commission: 0.03

Stock Name: M$FT
Amount paid for the stock: $ 15,000.00
Commission paid on the purchase: $ 450.00
Amount the stock sold for: $ 150,000.00
Commission paid on the sale: $ 4,500.00
Profit (or loss if negative): $ 130,050.00

Enter stock name OR -999 to Quit: -999

Stock Name: -999
Amount paid for the stock: $ 15,000.00
Commission paid on the purchase: $ 450.00
Amount the stock sold for: $ 150,000.00
Commission paid on the sale: $ 4,500.00
Profit (or loss if negative): $ 130,050.00
>>>

Answer

Remove calc() and display() from main(). You're already doing those things in load().