Initial commit

Solutions/9_4/stock.py

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+# stock.py
+
+from structly import *
+
+class Stock(Structure):
+    name = String()
+    shares = PositiveInteger()
+    price = PositiveFloat()
+    
+    @property
+    def cost(self):
+        return self.shares * self.price
+
+    def sell(self, nshares: PositiveInteger):
+        self.shares -= nshares
+
+if __name__ == '__main__':
+    portfolio = read_csv_as_instances('../../Data/portfolio.csv', Stock)
+    formatter = create_formatter('text')
+    print_table(portfolio, ['name','shares','price'], formatter)
+