Question

Help with python stock portfolio tracker first meeting with objects on my own

Answer 1

Hi I'm trying to make a python stock portfolio tracker, so far I have made two attempts, and got stuck at both of them, any tips?

#1
# Stock portfolio tracker

import datetime

def welcome():
print "Welcome to the stock portfolio tracker"
print "Let's hope it works this time"

class Stock(object):
# Creates and saves a portfolio of stocks
def __init__(self, date, price, number_of_shares):
# Initialises the portfolio and takes three arguments
self.date = date
self.price = price
self.number_of_shares = number_of_shares

def __str__(self):
# Creates a string representation of the portfolio
# and prints requested values
return "date purchased :%s, Price: %s, Number_of_shares %s" %( self.date, self.price, self.number_of_shares)

def getPurchaseValue(self):
# Computes the purchase value as price per share x number of shares
return (self.price * self.number_of_shares)

def getSaleValue(self, salePrice):
# Computes the sale value as price per share * shares
return (self.salePrice * number_of_shares)

class Portfolio(Stock):
# Creates a portfolio of collected stocks

def __init__(self, stockName):
self.stockName = stockName
portfolio = []

def addStock(self):
newStock = raw_input('What is the company ticker?')
name = raw_input('Enter the ticker of the stock to add')
price = raw_input('Enter the price of the stock')
shares = raw_input('How many shares to add?')
newstock[name, price, shares]

def main():
welcome()



MSFT = Stock(10,10,10)
print MSFT

Answer 2

#2
# New attempt at creating a portfolio of stocks

class DataBook(object):

def __init__(self, price, shares, date):
self.price = price
self.shares = shares
self.date = date
self.get_info()

def get_info(self):
sf = \
""" price = %s
shares = %s
date = %s
"""
return sf %(self.price, self.shares, self.date)

def main():
name_dic = {}

ticker = raw_input("What is the company's ticker?")
price = int(raw_input('What was the price?'))
shares = raw_input('how many shares did you buy?')
date = raw_input(' When did you buy it?')
name_dic[ticker] = DataBook(price, shares, date)

main()

Answer 3

Any feedback will be greatly appreciated=)

Answer 4

In Stock.getSaleValue() where does self.salePrice come from? In Portfolio.addStock, what is newstock[name, price, shares]? Square brackets are for lists, parentheses are for functions. DataBook.get_info has a formatted string, but no variables substituted in.

main() looks like it would be setting up a dictionary, but name_dic is a list.

Advice: Develop you classes independently. It helps to develop/debug them one at a time, and if you're hoping to reuse them it forces you to make them separate.