Initial commit

Exercises/ex1_3.md

@@ -0,0 +1,41 @@
+\[ [Index](index.md) | [Exercise 1.2](ex1_2.md) | [Exercise 1.4](ex1_4.md) \]
+
+# Exercise 1.3
+
+*Objectives:*
+
+- Review basic file I/O
+
+*Files Created:* `pcost.py`
+
+## (a) Working with files
+
+The file `Data/portfolio.dat` contains a list of lines with information
+on a portfolio of stocks.  The file looks like this:
+
+```
+AA 100 32.20
+IBM 50 91.10
+CAT 150 83.44
+MSFT 200 51.23
+GE 95 40.37
+MSFT 50 65.10
+IBM 100 70.44
+```
+
+The first column is the stock name, the second column is the number of
+shares, and the third column is the purchase price of a single share. 
+
+Write a program called `pcost.py` that opens this file, reads
+all lines, and calculates how much it cost to purchase all of the shares
+in the portfolio. To do this, compute the sum of the second column
+multiplied by the third column.
+
+\[ [Solution](soln1_3.md) | [Index](index.md) | [Exercise 1.2](ex1_2.md) | [Exercise 1.4](ex1_4.md) \]
+
+----
+`>>>` 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/)