用python写一个Person函数类，有姓名、年龄、身高、体重等属性，有吃饭等方法

class Person:
def __init__(self, name, age, height, weight):
self.name = name
self.age = age
self.height = height
self.weight = weight

def eat(self):
print("{} is eating".format(self.name))

def sleep(self):
print("{} is sleeping".format(self.name))

def __str__(self):
return "{} is {} years old, {}m tall and {}kg".format(self.name, self.age, self.height, self.weight)

# Example usage
person1 = Person("John", 25, 1.75, 70)
print(person1)
person1.eat()
person1.sleep()