遍历列表，并删除元素

print("-----------------------")
list2 = [1, 2, 3, 4, 5, 6, 55, 33, 66, 87]

for index, item in enumerate(list2[:]):
    print(index,' ',item)
    list2.remove(item)

print(list2)

print("-----------------------")
list3 = [1, 2, 3, 4, 5, 6, 55, 33, 66, 87]
list4 = list3.copy()
for i in list4:
    list3.remove(i)
print(list3)