In python 3, how can we change a list of numbers (such as 4, 1, -7, 1, -3) and change all of the negative signs into positive signs?
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                    Python, like virtually all programming languages, has a built-in absolute value function. Just use it in a loop or a comprehension. – John Coleman Sep 14 '16 at 18:14
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                    You would have found many results if you had googled "negative numbers to positive python" – Sterling Archer Sep 14 '16 at 18:18
 
    