python面试题

python实现列表去重的方法

#1.内置函数set：
list1=[1,2,1,2,3,4,5,6]
list2=list(set(list1))
print(list2)

#遍历去重
list1=[1,2,1,2,3,4,5,6]
list2=[]
for i in list1:
    if not i in list2:
        list2.append(i)
print(list2)

#列表推到式
list1=[1,2,1,2,3,4,5,6]
list2=[]
print([list2.append(i) for i in list1 if not i in list2])

将a=[[1,2],[3,4],[5,6]]得到[1,2,3,4,5,6]

a=[[1,2],[3,4],[5,6]]
list1=[j for i in a for j in i ]
print(list1)

如何用Python输出一个Fibonacci数列？

def fib(num):
    result=[0,1]
    for i in range(num-2):
        result.append(result[-2]+result[-1])
    return(result)

n=int(input('输入fibs多少项：'))
print(fib(n))