task1
class Account: def __init__(self, name, account_number, initial_amount = 10): self._name = name self._card_no = account_number self._balance = initial_amount def deposit(self, amount): self._balance += amount def withdraw(self, amount): if self._balance < amount: print('余额不足') return self._balance -= amount def info(self): print('持卡人姓名:', self._name) print('持卡人账号:', self._card_no) print('持卡人账户余额:', self._balance) def get_balance(self): return self._balance def main(): print('测试账户1:'.center(30, '*')) a1 = Account('Bob', '5002311', 20000) a1.deposit(5000) a1.withdraw(4000) a1.info() print() print('测试账户2:'.center(30, '*')) a2 = Account('Joe', '5006692', 20000) a2.withdraw(10000) a2.withdraw(5000) a2.info() if __name__ == '__main__': main()
task2
''' shape.py是一个图形类模块 包括: 基类: 图形类Shape 派生类: 矩形类Rect, 圆形类Circle, 三角形类Triangle ''' class Shape: '''形状基类''' def info(self): '''打印图形信息''' pass def area(self): '''计算面积''' pass def perimeter(self): '''计算周长''' pass class Rect(Shape): ''' 矩形类 , 继承自Shape 属性:矩形左上角点的坐标、宽、高 方法: 打印矩形信息,计算面积、周长 ''' def __init__(self, x = 0, y = 0, length = 2, width = 1): '''构造矩形对象,根据矩形左上角顶点坐标(x,y)和长、宽 ''' self._x = x self._y = y self._width = width self._length = length def info(self): print(f'矩形左上角顶点坐标: ({self._x}, {self._y})') print(f'矩形长 : {self._length}') print(f'矩形宽 : {self._width}') def area(self): return self._length * self._width def perimeter(self): return (self._length + self._width) * 2 class Circle(Shape): def __init__(self, x=0, y=0, radius=1): self._x = x self._y = y self._r = radius def info(self): print(f'圆心 : ({self._x}, {self._y})') print(f'半径 : {self._r}') def area(self): return 3.14 * self._r * self._r def perimeter(self): return 2 * 3.14 * self._r class Triangle(Shape): def __init__(self, a=1, b=1, c=1): self._a, self._b, self._c = a, b, c def info(self): print(f'三角形三边长 : ({self._a}, {self._b}, {self._c})') def area(self): s = (self._a + self._b + self._c) / 2 ans = (s * (s - self._a) * (s - self._b) * (s - self._c)) ** 0.5 return ans def perimeter(self): return (self._a + self._b + self._c) # 测试类 def main(): print('测试1: '.center(40, '*')) shapes_lst1 = [Circle(), Rect(), Triangle()] for t in shapes_lst1: t.info() print(f'面积 : {t.area():.2f}') print(f'周长 : {t.perimeter():.2f}') print() print('测试2: '.center(40, '*')) shapes_lst2 = [Circle(x=2, y=2, radius=10), Rect(x=50, y=50, length=10, width=5), Triangle(a=3, b=4, c=5)] for t in shapes_lst2: t.info() print(f'面积 : {t.area():.2f}') print(f'周长 : {t.perimeter():.2f}') print() if __name__ == '__main__': main()
task3
from math import * def func(x): m = 0 s = 2 fst = 1/(((2*pi)**0.5)*s) sed = exp((-0.5)*((x-m)/s)**2) return fst*sed print(f'x = 1,f = {func(1):.8f}') print(f'x = 3,f = {func(3):.8f}') print(f'x = 5,f = {func(5):.8f}') print(f'x = 7,f = {func(7):.8f}') print(f'x = 9,f = {func(9):.8f}')
标签:__,info,self,实验,._,print,def From: https://www.cnblogs.com/dughy/p/17479304.html