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copied!<p>Hello Seamonkey and welcome to SO. I am happy that you have put more effort into this question than your last :)</p> <p>I am going to walk through the code with you step by step. For simple problems, I find that it is easier to <em>not</em> use functions, as they can be annoying when one has to deal with global variables</p> <pre><code>#This part of the code gets the entire fibonacci sequence list_of_numbers = [] even_fibs = [] x,y = 0,1 #sets x to 0, y to 1 while y <= 4000000: #Gets numbers till 4 million list_of_numbers.append(y) x, y = y, x+y #updates the fib sequence </code></pre> <p>In this block of code, (you can change it to a function if you wish), we calculate the full fibonacci sequence, up to 4 million. We also create two lists, <code>list_of_numbers</code> and <code>even_fibs</code>. The first is used to store the full sequence, the second is used to help us to store the even numbers. On to the next block. </p> <pre><code>coord = 0 for number in range(len(list_of_numbers)): test_number = list_of_numbers [coord] if (test_number % 2) == 0: even_fibs.append(test_number) coord+=1 </code></pre> <p>Here I tested if numbers within the list <code>list_of_numbers</code> were even. If they were, I added them to the <code>even_fibs</code> list. You can read up on lists <a href="http://www.sthurlow.com/python/lesson06/" rel="nofollow">here</a>.</p> <pre><code>print "Normal: ", list_of_numbers #outputs full sequence print "\nEven Numbers: ", even_fibs #outputs even numbers print "\nSum of Even Numbers: ", sum(even_fibs) #outputs the sum of even numbers </code></pre> <p>This simply outputs our findings. </p> <hr> <p>Since you seem to be fond of functions, I added the code here. The explanation is the same as it is up top.</p> <pre><code>#This part of the code gets the entire fibonacci sequence list_of_numbers = [] even_fibs = [] def fib(list_of_numbers): x,y = 0,1 #sets x to 0, y to 1 while x+y <= 4000000: #Gets numbers till 4 million list_of_numbers.append(y) x, y = y, x+y #updates the fib sequence return list_of_numbers def even(list_of_numbers, even_fibs): coord = 0 for number in range(len(list_of_numbers)): test_number = list_of_numbers [coord] if (test_number % 2) == 0: even_fibs.append(test_number) coord+=1 return even_fibs fib(list_of_numbers) #call fib function even(list_of_numbers, even_fibs) #Call the even function #Output print "Normal: ", list_of_numbers print "\nEven Numbers: ", even_fibs print "\nSum of Even Numbers: ", sum(even_fibs) </code></pre>

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