一，
import random
2 '''
3 定义一个字符串"python的创始人是Guido",试分别打印出"Guido"，"odiuG", "ph的人uo"
4 '''
5 a = 'python的创始人是Guido'
6 print(a[-5:])
7 print(a[-1:-6:-1])
8 print(a[::3])
9 '''
二，
10 7.有字符串"你"和"最帅"，如何得到字符串"你最帅"，又如何得到字符串"你最帅最帅最帅"
11 '''
12 a = '你'
13 b = '最帅'
14 print(a+b)
15 print(a+3*b)
三，
for i in range(10):
3 a = random.randint(0,1000)
4 b = []
5 for i in range(3):
6 b.append(a%10)
7 a = a//10
8 if b[0]==b[2] and b[2]!=0 and b[0]!= 0 or b[0]==b[1]and b[2]==0 and b[0]!=0:
9 print(b[2]*100+b[1]*10+b[0])
四，
a = 300
2 b = 15
3 c = 9
4 d = 1
5 for i in range(0,20):
6 for e in range(0,34):
7 for f in range(0,300):
8 if i * b + e * c + d * f ==300 and i + e + f == 100:
9 print('买大公鸡{}只，母鸡{}只，小鸡{}只'.format(i,e,f))
五，
a = input('请输入一个字符串：')
2 b = 0
3 c = 0
4 for i in range(len(a)):
5 if 65 <=ord(a[i]) <= 90 or 97 <= ord(a[i]) <= 122:
6 b += 1
7 else:
8 c += 1
9 print(b,c)
六，
a,b =eval(input('请输入年份月份：'))
2 x = 0
3 z = 0
4 for i in range(1990,a):
5
6
7 if i % 4 == 0 and i % 100 != 0 or i % 400 ==0:
8 x += 366
9 else:
10 x += 365
11 print(x)
12 for i in range(1,b):
13 if a % 4 == 0 and a % 100 != 0 or a % 400 ==0:
14 if i in (1,3,5,7,8,10,12):
15 d = 31
16 elif i in (4,6,9,11):
17 d = 30
18 else:
19 d = 29
20 else:
21 if i in (1,3,5,7,8,10,12):
22 d = 31
23 elif i in (4,6,9,11):
24 d = 30
25 else:
26 d = 28
27 z = z+d
28 print(z)
29 y = x + z
30 print(y)
31 h = y % 7
32 if h == 0:
33 print('周一')
34 elif h ==1:
35 print('周二')
36 elif h ==2:
37 print('周三')
38 elif h ==3:
39 print('周四')
40 elif h ==4:
41 print('周五')
42 elif h ==5:
43 print('周六')
44 elif h ==6:
45 print('周日')
