# pcost.py

#

# Exercise 1.27

import csv

import sys

def portfolio_cost(file):

'Read CSV file of stock, shares, price and compute total cost'

f = open(file, 'rt')

rows = csv.reader(f)

headers = next(rows)

total = 0

for row in rows:

try:

stock, shares, price = row

total = total + int(shares)*float(price)

except ValueError: # handle missing values

print("Couldn't parse", row)

f.close()

return total

if len(sys.argv) == 2:

filename = sys.argv[1]

else:

filename = 'Data/portfolio.csv'

total = portfolio_cost(filename)

print(f"Total cost {total:.2f}")