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Elizabeth McInerney
3,175 PointsPython Collections/Tuples/Tuples with functions
I don't understand why this prints out the whole alphabet, instead of just printing out the first 2 letters over and over again:
for step in enumerate(my_alphabet_list):
print('{}, {}'..format(step[0],step[1]))
2 Answers
Tatiana Jamison
6,188 PointsHi Elizabeth, in a for loop, once the instructions have been followed, it moves on to the next item.
As an analogy, imagine you're handed a stack of papers and told that you need to write your name on each one. If you're like Python, you'll write your name on the first paper, and then set it aside, and then write your name on the second paper, and then set it aside, and so on, for as long as you have papers. Once you've hit the end of the pile, you'll know that your job is complete - and the final result will be a stack of papers where each one has your name written just once (instead of one paper with your name written 20 times!).
Hope that helps!
Elizabeth McInerney
3,175 PointsYes, got it now, thanks!
Elizabeth McInerney
3,175 PointsElizabeth McInerney
3,175 PointsYes, I get that, but what I find confusing about this is that it keeps using step[0] and step[1]. I am feeling like it should go to step[26]. Maybe step keeps getting rewritten, with step[0] as the index and step[1] as the letter in the alphabet. So does that mean that when you use enumerate, the thing you are looping over (step) is no longer a single variable, but is now a list with 2 items, at index [0] and [1]?
Tatiana Jamison
6,188 PointsTatiana Jamison
6,188 PointsAh! Each step in the enumerate returns a tuple of the form (number, letter_string), e.g., (1, 'a'), (2, 'b')... and so on.
step[0] then calls the value from the first position of the tuple (the number) and step[1] calls the value from the second position of the tuple (the letter string).
Does this help?