创建一个列表，该列表在Python中的其他两个列表中每个元素只有一次

list1 = [1, 2, 3, 4, 5]
list2 = [4, 5, 6, 7, 8]

result = []
for element in list1:
    if element not in list2:
        result.append(element)

print(result)

list1 = [1, 2, 3, 4, 5]
list2 = [4, 5, 6, 7, 8]

result = [element for element in list1 if element not in list2]
print(result)

list1 = [1, 2, 3, 4, 5]
list2 = [4, 5, 6, 7, 8]

result = list(set(list1) - set(list2))
print(result)