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')