runtimequestion 127 Comprehensions · medium
Price labels without the loop
The team's style guide says a function that only builds a list from another list should be a comprehension. Refactor price_labels into a list comprehension. Behaviour must not change: free items still say Free, every other price shows the currency sign and two decimals, and there is still one label per price, in order.
Function
price_labels(prices, currency) (same name, same result)pricesa list of prices, 0 or more
Returnsone label per price:
"Free" for 0, otherwise like "$12.50"Structurethe result is built by a list comprehension, not by
append in a loopExamples
callprice_labels([12.5, 0, 7.49], '$')returns['$12.50', 'Free', '$7.49']
callprice_labels([31], '£')returns['£31.00']
callprice_labels([], '$')returns[]