13. Python, CheckiO Elementary_Nearest Value

Find the nearest value to the given one.

You are given a list of values as set form and a value for which you need to find the nearest one.

For example, we have the following set of numbers: 4, 7, 10, 11, 12, 17, and we need to find the nearest value to the number 9. If we sort this set in the ascending order, then to the left of number 9 will be number 7 and to the right - will be number 10. But 10 is closer than 7, which means that the correct answer is 10.

A few clarifications:

• If 2 numbers are at the same distance, you need to choose the smallest one;
• The set of numbers is always non-empty, i.e. the size is >=1;
• The given value can be in this set, which means that it’s the answer;
• The set can contain both positive and negative numbers, but they are always integers;
• The set isn’t sorted and consists of unique numbers.

Input: Two arguments. A list of values in the set form. The sought value is an int.

Output: Int.

Example:

nearest_value({4, 7, 10, 11, 12, 17}, 9) == 10

nearest_value({4, 7, 10, 11, 12, 17}, 8) == 7

 

-> Solve it

 

def nearest_value(values: set, one: int) -> int:

   return min((abs(n-one), n) for n in values

 

def nearest_value(values: set, one: int) -> int:
    return min((abs(n-one), n) for n in values

abs(x)는 어떤 숫자를 입력받았을 때, 그 숫자의 절댓값을 돌려주는 함수이다.

>>> abs(3)
3
>>> abs(-3)
3
>>> abs(-1.2)
1.2

def nearest_value(value: set, one: int) -> int:
    values = list(values)
    values.sort()
    
    near_value = values[0] # 제일 작은 것.
    for i in range(1, len(values)):
    	if abs(values[i] - one) < abs(near_value - one):
        	near_value = valuses[i]
    retrun near_value

참고 : wikidocs.net/32

if __name__ == '__main__':
    print("Example:")
    print(nearest_value({4, 7, 10, 11, 12, 17}, 9))

    # These "asserts" are used for self-checking and not for an auto-testing
    assert nearest_value({4, 7, 10, 11, 12, 17}, 9) == 10
    assert nearest_value({4, 7, 10, 11, 12, 17}, 8) == 7
    assert nearest_value({4, 8, 10, 11, 12, 17}, 9) == 8
    assert nearest_value({4, 9, 10, 11, 12, 17}, 9) == 9
    assert nearest_value({4, 7, 10, 11, 12, 17}, 0) == 4
    assert nearest_value({4, 7, 10, 11, 12, 17}, 100) == 17
    assert nearest_value({5, 10, 8, 12, 89, 100}, 7) == 8
    assert nearest_value({-1, 2, 3}, 0) == -1
    print("Coding complete? Click 'Check' to earn cool rewards!")