教材第四章课后习题

代码：#4.1
print(4.1)
list1 = ['chicken','beef','fish']
for i in list1:
print("I like " + i + " pizza.")
print("I really love pizza!")

#4.2
print(4.2)
list2 = ['dog','cat','wolf']
for i in list2:
print("A " + i +" is a good pet.")
print("These are all good pets.")

#4.3
print(4.3)
for i in range(1,21):
print(i,end=' ')

#4.4
print(4.4)
list4 = list(range(1,1000001))
#print(list4) 太长了，就不打印了

#4.5
print(4.5)
list5 = list(range(1,1000001))
print(min(list5))
print(max(list5))
print(sum(list5))

#4.6
print(4.6)
list6 = list(range(1,21,2))
for i in list6:
print(i,end=" ")
print()

#4.7
print(4.7)
list7 = list(range(3,31,3))
for i in list7:
print(i,end=" ")
print()

#4.8
print(4.8)
list8 = []
for i in range(1,11):
list8.append(i**3)
for i in list8:
print(i,end=" ")
print()

#4.9
print(4.9)
list9 = [value**3 for value in range(1,11)]
for i in list8:
print(i,end=" ")
print()

#4.10
print('4.10')
list10 = ["one","two","three","four","five"]
print("first three items:",list10[:3])
print("middle three items:",list10[1:4])
print("last three items:",list10[-3:])

#4.11
print(4.11)
list11 = list1[:]
list1.append("rabbit")
list11.append("null")
print("My favorite pizzas are:")
for i in list1:
print(i,end=" ")
print()
print("My friend's favourtie pizzas are:")
for i in list11:
print(i,end=" ")
print()

#4.12
#这个题目与4.11相似，略

#4.13
print(4.13)
list13 = ("one","two","three","four","five")
for i in list13:
print(i,end=" ")
print()
#list13[2] = "233" 会报错，就注释掉了，否则影响输出
list13 = ("one","two","three","4","5")
for i in list13:
print(i,end=" ")
print()

#4.14
#略

#4.15
#略输出：4.1
I like chicken pizza.
I like beef pizza.
I like fish pizza.
I really love pizza!
4.2
A dog is a good pet.
A cat is a good pet.
A wolf is a good pet.
These are all good pets.
4.3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 4.4
4.5
1
1000000
500000500000
4.6
1 3 5 7 9 11 13 15 17 19
4.7
3 6 9 12 15 18 21 24 27 30
4.8
1 8 27 64 125 216 343 512 729 1000
4.9
1 8 27 64 125 216 343 512 729 1000
4.10
first three items: ['one', 'two', 'three']
middle three items: ['two', 'three', 'four']
last three items: ['three', 'four', 'five']
4.11
My favorite pizzas are:
chicken beef fish rabbit
My friend's favourtie pizzas are:
chicken beef fish null
4.13
one two three four five
one two three 4 5