1
class Student:
''' 描述学生的类'''
def __init__(self, name, age, gender, phone, address, email):
''' 构造器 '''
self.name = name
self.age = age
self.gender = gender
self.phone = phone
self.address = address
self.email = email
def eat(self, food):
''' 吃 '''
print('%s正在吃%s' % (self.name, food))
def drink(self, drink):
''' 喝 '''
print('%s正在喝%s' % (self.name, drink))
def play(self, sport, other):
''' 玩 '''
print('我今年%s岁，正和%s玩%s' % (self.age, other, sport))
def sleep(self):
''' 睡 '''
print('%s正在%s睡觉' % (self.name, self.address))
def __repr__(self):
return 'Student(name=%s, age=%d, phone=%s, address=%s, email=%s)' % (self.name, self.age, self.phone, self.address, self.email)
if __name__ == '__main__':
stu = Student('孙悟空', 500, 'MALE', '02028309358',
'灵台方寸山', '[email protected]')
stu.eat('桃子')
stu.drink('美酒')
stu.play('棍子', '牛魔王')
stu.sleep()
2
from student import Student
contacts = [Student('孙悟空', 500, 'MALE', '02028309358',
'灵台方寸山', '[email protected]'),
Student('牛魔王', 650, 'MALE', '02028309378',
'积雷山摩云洞', '[email protected]'),
Student('白骨精', 23, 'MALE', '13699881122',
'白骨岭', '[email protected]'),
Student('猪八戒', 500, 'MALE', '13588889999',
'福临山山云栈洞', '[email protected]')]
def find_by_name(name):
return [x for x in contacts if name in x.name]
def find_by_email(email):
return [x for x in contacts if email in x.email]
def find_by_address(address):
return [x for x in contacts if address in x.address]
if __name__ == '__main__':
t = input('请输入查找的方式, 名字(n), Email(e), 地址(a): ')
k = input('请输入查找的关键字: ')
if t == 'n':
print(find_by_name(k))
elif t == 'e':
print(find_by_email(k))
elif t == 'a':
print(find_by_address(k))
else:
print('输入有误!')
3
class Point:
''' 描述点的类'''
def __init__(self, x, y):
''' 构造器 '''
self.x = x
self.y = y
def distance(self, other):
''' 计算两点之间距离 '''
return ((self.x - other.x) ** 2 + (self.y - other.y) ** 2) ** 0.5
def judge_triangle(self, p1, p2):
''' 判断3个点组成的三角形 '''
self_p1 = self.distance(p1)
self_p2 = self.distance(p2)
p1_p2 = p1.distance(p2)
if self_p1 > self_p2 and self_p1 > p1_p2:
if self_p1 > (self_p2 + p1_p2):
print('不是三角形')
else:
print("钝角三角形") if self_p1 ** 2 > (self_p2 ** 2 + p1_p2 ** 2) \
else print("锐角三角形") if self_p1 ** 2 < (self_p2 ** 2 + p1_p2 ** 2) \
else print("直角三角形")
if self_p2 > self_p1 and self_p2 > p1_p2:
if self_p2 > (self_p1 + p1_p2):
print('不是三角形')
else:
print("钝角三角形") if self_p2 ** 2 > (self_p1 ** 2 + p1_p2 ** 2) \
else print("锐角三角形") if self_p2 ** 2 < (self_p1 ** 2 + p1_p2 ** 2) \
else print("直角三角形")
if p1_p2 > self_p1 and p1_p2 > self_p2:
if p1_p2 > (self_p1 + self_p2):
print('不是三角形')
else:
print("钝角三角形") if p1_p2 ** 2 > (self_p1 ** 2 + self_p2 ** 2) \
else print("锐角三角形") if p1_p2 ** 2 < (self_p1 ** 2 + self_p2 ** 2) \
else print("直角三角形")
def __repr__(self):
return 'Point(x=%s, y=%s)' % (self.x, self.y)
if __name__ == '__main__':
pt = Point(1, 1)
print(pt.distance(Point(2, 3)))
pt.judge_triangle(Point(4, 1), Point(5, 5))
4
import math
class Points:
''' 描述点的类 '''
def __init__(self, x, y, z):
''' 构造器 '''
self.x=x
self.y=y
self.z=z
def __sub__(self, no):
''' 为减法提供支持的方法 '''
return Points((self.x-no.x),(self.y-no.y),(self.z-no.z))
def dot(self, no):
''' 点积 '''
return (self.x*no.x)+(self.y*no.y)+(self.z*no.z)
def cross(self, no):
''' 叉积 '''
return Points((self.y*no.z-self.z*no.y),(self.z*no.x-self.x*no.z),(self.x*no.y-self.y*no.x))
def absolute(self):
return pow((self.x ** 2 + self.y ** 2 + self.z ** 2), 0.5)
if __name__ == '__main__':
points = list()
print('请依次输入4个点的x y z（中间以空格隔开）')
for i in range(4):
a = list(map(float, input().split()))
points.append(a)
a, b, c, d = Points(*points[0]), Points(*points[1]), Points(*points[2]), Points(*points[3])
X = (b - a).cross(c - b)
Y = (c - b).cross(d - c)
angle = math.acos(X.dot(Y) / (X.absolute() * Y.absolute()))
print("%.2f" % math.degrees(angle))
5
class Transport:
def move(self, distance):
print('我移动了%s千米' % distance)
class Car(Transport):
def __init__(self, name):
self.name = name
def move(self, distance):
print('%s我在马路上开了%s千米' % (self.name, distance))
class Train(Transport):
def __init__(self, speed):
self.speed = speed
def move(self, distance):
print('我以速度%s在铁轨上走了%s千米' % (self.speed, distance))
class Plain(Transport):
def fly(self, distance):
print('我在天空飞了%s千米' % distance)
if __name__ == '__main__':
c = Car('BMW')
c.move(30.2)
t = Train(300)
t.move(230.5)
p = Plain()
p.move(3440.8)
p.fly(3440.8)
