面向对象编程和内置模块

task1

 1 class Account:
 2 
 3     def __init__(self, name, account_number, initial_amount = 10):
 4         self._name = name
 5         self._card_no = account_number
 6         self._blance = initial_amount
 7 
 8     def deposit(self, amount):
 9         self._blance += amount
10 
11     def withdraw(self, amount):
12         if self._blance < amount:
13             print('余额不足')
14             return
15 
16         self._blance -= amount
17 
18     def info(self):
19         print('持卡人姓名：', self._name)
20         print('持卡人账户：', self._card_no)
21         print('持卡人账户余额：', self._blance)
22 
23     def get_blance(self):
24         return self._blance
25 
26 def main():
27     print('测试账户1：'.center(30, '*'))
28     a1 = Account('Bob', '500669', 20000)
29     a1.deposit(500)
30     a1.withdraw(400)
31     a1.info()
32 
33     print()
34 
35     print('测试账户2'.center(30, '*'))
36     a2 = Account('Alice', '500668', 30000)
37     a2.withdraw(10000)
38     a2.withdraw(30000)
39     a2.info()
40 
41 if __name__ == '__main__':      #后面的内容只有在自己使用的时候才会被引用，如果其他的程序不会运行
42     main()

结果：

task2

1 from shape_mood import Rect, Circle
2 
3 shape_lst = [Rect(5, 5, 10, 5), Circle(), Circle(1, 1, 10)]
4 
5 for i in shape_lst:
6     i.info()
7     print(f'面积：{i.area():.2f}')
8     print(f'周长：{i.perimeter():.2f}')
9     print()

结果：

task3

 1 def func(x, m = 0, s = 2):
 2     import math
 3     x1 = 1/(math.sqrt(2 * math.pi) * s)
 4     x2 = (-1/2) * ((x-m)/s)**2
 5     x3 = math.exp(x2)
 6 
 7     return x1 * x3
 8 
 9 def main():
10     fun_lst = [1, 3, 5, 7, 9]
11     for i in fun_lst:
12         print(f'x = {i}', end = ',')
13         print(f'f = {func(i):.8f}')
14 
15 if __name__ == '__main__':
16     main()

结果：