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# pcost.py

#

# Exercise 1.27

'''

The columns in portfolio.csv correspond to the stock name, number of shares,

and purchase price of a single stock holding. Write a program called pcost.py

that opens this file, reads all lines, and calculates how much it cost to purchase

all of the shares in the portfolio.

'''

## above script into a method

import gzip

import os

def portfolio_cost(filename):

total_cost = 0

with gzip.open(fpath,'rt') as f:

next(f)

for line in f:

data_list = line.split(',')

cost = int(data_list[1]) * float(data_list[2])

total_cost += cost

return total_cost

fpath = os.getcwd()

fpath += r'\work\data\portfolio.csv.gz'

total_cost = 0

tcost = portfolio_cost(fpath)

print('## Total cost for the shares {0:4f}',tcost)