my_list = [56, 78, 12, 32, 4, 8, 9, 100, 11]

print("列表是：")
print(my_list)

my_result = [elem for elem in my_list if int(str(elem)[::-1]) not in my_list]

print("结果是：")
print(my_result)

列表是：
[56, 78, 12, 32, 4, 8, 9, 100, 11]
结果是：
[56, 78, 12, 32, 100]