Preceding number list X69413
Write a function pre_number_list(n, f) that given an integer n and a list of integers f, returns the list formed by the numbers in f that appear just before each ocurrence of n in f. The order of appearance of the numbers in the resulting list must preserve the original order.
Sample session
>>> pre_number_list(7, [7, 10, 7, 5, 8, 7]) [10, 8] >>> pre_number_list(0, [-3 , 0]) [-3] >>> pre_number_list(0 , [0, -3]) [] >>> pre_number_list(6, [5, 6]) + pre_number_list(6, [1, 6, 2, 6]) [5, 1, 2] >>> pre_number_list(7, [5]) [] >>> pre_number_list(6, []) [] >>> pre_number_list(7, [7, 7, 7]) [7, 7]
Information
- Author
- ProAl
- Language
- English
- Official solutions
- Python
- User solutions
- Python