练习一

1. #!/usr/bin/python
2. # -*- coding: UTF-8 -*-
4. for i in range(1,5):
5. for j in range(1,5):
6. for k in range(1,5):
7. if( i != k ) and (i != j) and (j != k):
8. print i,j,k

输出结果为：

练习二

1. #!/usr/bin/python
2. # -*- coding: UTF-8 -*-
4. i = int(raw_input('净利润:'))
5. arr = [1000000,600000,400000,200000,100000,0]
6. rat = [0.01,0.015,0.03,0.05,0.075,0.1]
7. r = 0
8. for idx in range(0,6):
9. if i>arr[idx]:
10. r+=(i-arr[idx])*rat[idx]
11. print (i-arr[idx])*rat[idx]
12. i=arr[idx]
13. print r

输出结果为：

练习三

1. #!/usr/bin/python
2. # -*- coding: UTF-8 -*-
3. 1. for i in range(1,85):
4. if 168 % i == 0:
5. j = 168 / i;
6. if i > j and (i + j) % 2 == 0 and (i - j) % 2 == 0 :
7. m = (i + j) / 2
8. n = (i - j) / 2
9. x = n * n - 100
10. print(x)

输出结果为：

练习四

1. #!/usr/bin/python
2. # -*- coding: UTF-8 -*-
4. year = int(raw_input('year:\n'))
5. month = int(raw_input('month:\n'))
6. day = int(raw_input('day:\n'))
8. months = (0,31,59,90,120,151,181,212,243,273,304,334)
9. if 0 < month <= 12:
10. sum = months[month - 1]
11. else:
12. print 'data error'
13. sum += day
14. leap = 0
15. if (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0)):
16. leap = 1
17. if (leap == 1) and (month > 2):
18. sum += 1
19. print 'it is the %dth day.' % sum

输出结果为：