[Python] 목록 정렬 - 어렵고 쉬운 방법

arr = [5,2,8,7,1]
temp = 0
for i in range(0,len(arr)):
    for j in range(i+1, len(arr)):
        if arr[i] > arr[j]:
            temp = arr[i]
            arr[i] = arr[j]
            arr[j] = temp

print("Array sorted in ascending order: ")

for i in range(0, len(arr)):
    print(arr[i], end=" ")

for i in range(0,len(arr)):
    for j in range(i+1, len(arr)):
        if arr[i] < arr[j]:
            temp = arr[i]
            arr[i] = arr[j]
            arr[j] = temp

print("", end="\n")

print("Array sorted in descending order: ")

for i in range(0, len(arr)):
    print(arr[i], end=" ")

arr.sort()
print("", end="\n")
print("Array sorted in ascending order: ")
print(arr)

print("", end="\n")
print("Array sorted in descending order: ")
arr.sort(reverse=True)
print(arr)