I found this code elsewhere on the site, but for some reason I keep getting the same error message:
products[row[0]] = [row[1], row[2], row[3]]
IndexError: list index out of range.
I am unsure how to correct this, any help is appreciated, thanks.
This is the code:
MAX_FIELD_LEN = 8
def main():
products = {}
product_location = {}
location = 0
# This is the file directory being made.
with open('stockfile.txt', 'r+') as f:
# This is my file being opened.
for line in f:
# keep track of each products location in file to overwrite with New_Stock
product_location[line.split(',')[0]] = location
location += len(line)
# Need to strip to eliminate end of line character
line = line[:-1]
# This gets rid of the character which shows and end of line '\n'
row = line.split(',')
# The row is split by the comma
products[row[0]] = [row[1], row[2], row[3]]
# The products are equal to row 1 and row 2 and row 3. The GTIN is going to take the values of the product and price so GTIN 12345678 is going to correspond to Fridge and 1.
print(products)
total = 0
while True:
GTIN = input('Please input GTIN: ')
# To terminate user input, they just need to press ENTER
if GTIN == "":
break
if (GTIN not in products):
print('Sorry your code was invalid, try again:')
break
row = products[GTIN]
description, value, stock = row
print('Stock data: ')
print('GTIN \t\tDesc. \t\tStock \t\tValue')
print(GTIN,'\t',description,'\t', stock, '\t', value)
quantity = input('Please also input your quantity required: ')
row[2] = str(int(stock) - int(quantity))
product_total = int(quantity) * int(value)
for i in range(len(row)):
row[i] = row[i].rjust(MAX_FIELD_LEN)
New_Stock = GTIN.rjust(MAX_FIELD_LEN) + ',' + ','.join(row) + '\n'
#print(New_Stock, len(New_Stock))
f.seek(product_location[GTIN])
f.write(New_Stock)
print('You bought: {0} {1} \nCost: {2}'.format(GTIN, description, product_total))
total = total + product_total
f.close()
print('Total of the order is £%s' % total)
main()
Please check your input file 'stockfile.txt', at least one line of your file don't have 3 or more ",". Or you have some blank lines between your data.
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