リスト内で指定された値に最も近い数値を見つけるにはどうすればよいでしょうか?

def takeClosest(myList, myNumber):
    return min(myList, key=lambda x: abs(x - myNumber))

def takeClosest(myList, myNumber):
    low = 0
    high = len(myList) - 1
    while low <= high:
        mid = (low + high) // 2
        if myList[mid] == myNumber:
            return myList[mid]
        elif myList[mid] < myNumber:
            low = mid + 1
        else:
            high = mid - 1
    return min([myList[low], myList[high]], key=lambda x: abs(x - myNumber))