portfolio

# market data
market_current = {'TSLA': 662, 'GOOG': 2053, 'AAPL': 122, 'FB': 291, 'NFLX': 535}
positions = {'FB': 15, 'GOOG': 5, 'TSLA': 9}
market_2021 = {'TSLA': 985, 'GOOG': 2965, 'AAPL': 180, 'FB': 340, 'NFLX': 595}


class Portfolio:

    def __init__(self, holdings):
        self.holdings = holdings

    def add_to_portfolio(self, name, shares):
        self.holdings[name] = shares

    def performance(self, market_today, year='now'):
        total = 0
        report = ''
        for stock in self.holdings:
            report += f"{stock:4} {self.holdings[stock]:4} pcs {market_today[stock] * self.holdings[stock]:10,.2f} USD\n"
            total += market_today[stock] * self.holdings[stock]
        print(f"Stock portfolio value (total) {year}: {total:,.2f} USD")
        print(report)



p1 = Portfolio(positions)
# p1.add_to_portfolio('AAPL', 12)

p1.performance(market_2021, 2021)