functionized.py

def investigate_loop()
        i = 0
        numbers = []

        while i < 6:
                print "At the top i is %d" % i
                numbers.append(i)

                i = i + 1
                print "Numbers now: ", numbers
                print "At the bottom i is %d" % i

functionized_and_called.py

# Define the function
def investigate_loop()
        i = 0
        numbers = []

        while i < 6:
                print "At the top i is %d" % i
                numbers.append(i)

                i = i + 1
                print "Numbers now: ", numbers
                print "At the bottom i is %d" % i

# "Run" the function (call it)
investigate_loop()

original.py

i = 0
numbers = []

while i < 6:
        print "At the top i is %d" % i
        numbers.append(i)

        i = i + 1
        print "Numbers now: ", numbers
        print "At the bottom i is %d" % i