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Exercises/ex1_5.md

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+\[ [Index](index.md) | [Exercise 1.4](ex1_4.md) | [Exercise 1.6](ex1_6.md) \]
+
+# Exercise 1.5
+
+*Objectives:*
+
+- Review of how to define a simple object
+
+*Files Created:* `stock.py`
+
+## (a) Defining a simple object
+
+Create a file `stock.py` and define the following class:
+
+```python
+class Stock:
+    def __init__(self, name, shares, price):
+        self.name = name
+        self.shares = shares
+        self.price = price
+    def cost(self):
+        return self.shares * self.price
+```
+
+Once you have done this, run your program and experiment with your new
+`Stock` object:
+
+```python
+>>> s = Stock('GOOG',100,490.10)
+>>> s.name
+'GOOG'
+>>> s.shares
+100
+>>> s.price
+490.1
+>>> s.cost()
+49010.0
+>>> print('%10s %10d %10.2f' % (s.name, s.shares, s.price))
+      GOOG        100     490.10
+>>> t = Stock('IBM', 50, 91.5)
+>>> t.cost()
+4575.0
+>>> 
+```
+
+\[ [Solution](soln1_5.md) | [Index](index.md) | [Exercise 1.4](ex1_4.md) | [Exercise 1.6](ex1_6.md) \]
+
+----
+`>>>` Advanced Python Mastery  
+`...` A course by [dabeaz](https://www.dabeaz.com)  
+`...` Copyright 2007-2023  
+
+![](https://i.creativecommons.org/l/by-sa/4.0/88x31.png). This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/)