Retail shop billing

# File handling 

# Retail shop billing 

import sys

import math

stock=None

order=None

try:

stock = open(sys.argv[1],"r")

# create dictionary

PriceList={}

for line in stock:

item,price = line.split()

PriceList[item]=int(price)

# print(PriceList)

billamt=0

for i in range(2,len(sys.argv)):

order = open(sys.argv[i],"r")

print("S.no\tItem\t\tRate\tQuantity\tAmount")

i=1

for line in order:

item,qty=line.split()

price = int(qty)*PriceList[item]

print(i,"\t",item.ljust(10),"\t",PriceList[item],"\t",int(qty),"\t\t",price)

billamt = billamt+price

                        i+=1

print("Total Amount =", billamt)

cgst = round(billamt*.09,2)

sgst = round(billamt*.09,2)

print("cgst =",cgst)

print("sgst =",sgst)

print("Net Amount =",math.floor(billamt+cgst+sgst))

print("**"*30)

except IOError as e:

print("File opening error : ", e)

except:

print("unknown error")

else:

print("\nThank you for shopping with us\n")

print("**"*30)

finally:

if(stock):

stock.close()

if(order):

order.close()

"""

Sample output:

input file: (3)

ShopPricelist.txt 

Walnut 700

Figs 520

Raisins 400

Chashewnut 680

Almond 700

Pistachio 1400

Dates 440

Apricot 650

Kiwi 680

Cardamon 3000

Pepper 480

custorder1.txt 

Walnut 1

Raisins 4

Almond 7

Dates 2

custorder2.txt

Apricot 2

Kiwi 4

Cardamon 5

Pepper 3

>python retailshopbilling.py ShopPricelist.txt custorder1.txt custorder2.txt

S.no    Item                Rate    Quantity        Amount

1        Walnut             700         1                   700

2        Raisins             400         4                   1600

3        Almond            700         7                   4900

4        Dates                440         2                   880

Total Amount = 8080

cgst = 727.2

sgst = 727.2

Net Amount = 9534

************************************************************

S.no    Item                Rate    Quantity        Amount

1        Apricot             650          2                   1300

2        Kiwi                  680         4                   2720

3        Cardamon        3000       5                   15000

4        Pepper              480         3                   1440

Total Amount = 20460

cgst = 1841.4

sgst = 1841.4

Net Amount = 24142

************************************************************

Thank you for shopping with us

************************************************************

"""