Editing DS4UX (Spring 2016)/Reading and writing files (section)

===Goals===
In the exercises below, you will learn the basic syntax for reading common types of file into Python, and transforming them into other types of files. We will only cover a couple of the most basic types of file conversation you might want to do here: 

# reading a raw (and messy!) comma-separated text file into Python with the generic <code>open</code> method, parsing through it line by line to clean it up, and output a much cleaner matrix version with newlines and tabs as delimiters.
# reading that file with Python's <code>csv</code> library, which provides you with additional options for reading, formatting, and writing files with datapoints that are separated by newlines (vertically) and commas (horizontally).