python20181211
16.请问这个函数有多少个参数?
def MyFun((x,y), (a, b)):
return x * y - a * b
零个参数
17.编写一个函数满足以下功能:
计算打印所有参数的和乘以基数(base=3)的结果
def sumn(*n): s = 0 for i in n: s += i return s*3 print(sumn(1,2,3))
1.
下面代码会输出什么:
def
f(x,l
=
[]):
for
i
in
range
(x):
l.append(i
*
i)
print
l
f(
2
)
f(
3
,[
3
,
2
,
1
])
f(
3
)
[0,1] [3,2,1,0,1,4] [0,1,0,1,4]
2.列表的sort方法和sorted的区别是什么?试举例说明?
sort()是直接修改序列 sorted()是排序之后的原本的序列没有变 s = [3,2,1,4,5] s.sort() print(s) [1, 2, 3, 4, 5] s = [3,2,1,4,5] print(sorted(s)) print(s) [1, 2, 3, 4, 5] [3, 2, 1, 4, 5]
3.尝试用两个方式,分别用一行语句实现去除了中的相同项,将结果存放在l2列表中
l1 = ['b','c','d','b','c','a','a']
l2 = []
l1 = ['b','c','d','b','c','a','a'] l2 = [] l2 = list(set(l1)) print(l2) n = [l2.append(i) for i in l1 if i not in l2] print(l2)
5.现有一个由100以内所有偶数组成的列表,将列表中所有能被4和6整除的数去除
s = [0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,
52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100]
s = [i for i in s if i % 4 != 0 and i % 6 != 0] print(s)