更新

Python-100-Days/Day01-15/Day09/dependency.py

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+"""
+
+对象之间的依赖关系和运算符重载
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-12
+
+"""
+
+
+class Car(object):
+
+	def __init__(self, brand, max_speed):
+		self._brand = brand
+		self._max_speed = max_speed
+		self._current_speed = 0
+
+	@property
+	def brand(self):
+		return self._brand
+
+	def accelerate(self, delta):
+		self._current_speed += delta
+		if self._current_speed > self._max_speed:
+			self._current_speed = self._max_speed
+
+	def brake(self):
+		self._current_speed = 0
+
+	def __str__(self):
+		return '%s当前时速%d' % (self._brand, self._current_speed)
+
+
+class Student(object):
+
+	def __init__(self, name, age):
+		self._name = name
+		self._age = age
+
+	@property
+	def name(self):
+		return self._name
+
+	# 学生和车之间存在依赖关系 - 学生使用了汽车
+	def drive(self, car):
+		print('%s驾驶着%s欢快的行驶在去西天的路上' % (self._name, car._brand))
+		car.accelerate(30)
+		print(car)
+		car.accelerate(50)
+		print(car)
+		car.accelerate(50)
+		print(car)
+
+	def study(self, course_name):
+		print('%s正在学习%s.' % (self._name, course_name))
+
+	def watch_av(self):
+		if self._age < 18:
+			print('%s只能观看《熊出没》.' % self._name)
+		else:
+			print('%s正在观看岛国爱情动作片.' % self._name)
+
+	# 重载大于(>)运算符
+	def __gt__(self, other):
+		return self._age > other._age
+
+	# 重载小于(<)运算符
+	def __lt__(self, other):
+		return self._age < other._age
+
+
+if __name__ == '__main__':
+	stu1 = Student('骆昊', 38)
+	stu1.study('Python程序设计')
+	stu1.watch_av()
+	stu2 = Student('王大锤', 15)
+	stu2.study('思想品德')
+	stu2.watch_av()
+	car = Car('QQ', 120)
+	stu2.drive(car)
+	print(stu1 > stu2)
+	print(stu1 < stu2)