16.请问这个函数有多少个参数?
def MyFun((x,y), (a, b)):
return x * y - a * b
答:2个,两个括号各为一个参数
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 ch(s): n=0 for i in s: n=n+i return n*3 s=[1,4,6,8] print(s) print(ch(s))
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)
答:f(2):=[0,1] f(3,[3,2,1])=[3,2,1,0,1,4,] f(3)=[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?
s=[1,4,2,7,3,8,5,9,0]
s1=sorted(s)
print(s)
print(s1)
[1, 4, 2, 7, 3, 8, 5, 9, 0]
[0, 1, 2, 3, 4, 5, 7, 8, 9]
s.sort()
print(s)
[0, 1, 2, 3, 4, 5, 7, 8, 9]
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) for i in l1: if i not in l2: l2.append(i) 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
l1=[] for i in range(100): if i%2==0: l1.append(i) print(l1) for n in l1: if n%4==0 or n%6==0: l1.pop(l1.index(n)) print(l1)