from typing import Type

from typedproperty import typedproperty, String, Integer, Float

class Stock:

name = String('name')

shares = Integer('shares')

price = Float('price')

#__slots__ = ('name','_shares','price')

def __init__(self,name,shares,price):

self.name = name

self.shares = shares

self.price = price

def __repr__(self) -> str:

return f'Stock({self.name!r},{self.shares!r},{self.price!r})'

@property

def shares(self):

return self._shares

@shares.setter

def shares(self,value):

if not isinstance(value,int):

raise TypeError('Expected int')

self._shares = value

@property

def cost(self):

return self.shares * self.price

def sell(self,numshares):

self.shares -= numshares

class MyStock(Stock):

def panic(self):

self.sell(self.shares)

import fileparse

import sys

def main(args):

global portDicts, portfolio

portDicts = {}

with open(args[1]) as lines:

portDicts = fileparse.parse_csv(lines, select=['name','shares','price'], types=[str,int,float])

portfolio = [Stock(d['name'],d['shares'],d['price']) for d in portDicts]

if __name__ == '__main__':

main(sys.argv)