可以举一个rearrange() 函数的例子吗

Sure! Here's an example of a rearrange() function:

def rearrange(arr):
    # sort the array
    arr.sort()
    
    # create a new array with the same length as the input array
    result = [0] * len(arr)
    
    # iterate over the input array and fill the new array with the values in a rearranged order
    for i in range(len(arr)):
        if i % 2 == 0:
            result[i] = arr[i//2]
        else:
            result[i] = arr[len(arr)-1-i//2]
    
    # return the rearranged array
    return result

This function takes an array as input and rearranges the elements in a specific order. It first sorts the input array and then creates a new array with the same length. Then, it iterates over the input array and fills the new array with the values in a rearranged order. Finally, it returns the rearranged array.