Transforming a list of data in Python
Exercise to be typed in ipython.
To test, you can use the range function to get some "sample" data to work with:
data = range(100) for d in data: print d
Imagine you want to multiply each number by 17.
for d in data: print d*17
Iterate & Append to a new list
A general purpose technique to translate the items of one list to another is to:
1. Create a new empty list
2. Iterate over the original list
3. Use the list.append function to add (transformed) items onto the new list
pp =  for d in data: pp.append(d) pp pp =  for d in data: pp.append(d*17) pp
Python also supports a more mathematically inspired notation called List Comprehensions. The result is more compact, and may or may not be easier to read.
p = range(100) pp = [x*17 for x in p]