请写出大鱼吃小鱼的代码

这里是一个简单的大鱼吃小鱼的 Python 代码示例：

class Fish:
    def __init__(self, size, direction):
        self.size = size
        self.direction = direction

    def eat(self, other_fish):
        if self.size > other_fish.size:
            self.size += other_fish.size
            return True
        else:
            return False

    def move(self):
        if self.direction == "right":
            self.direction = "left"
        else:
            self.direction = "right"

class Aquarium:
    def __init__(self, fish_list):
        self.fish_list = fish_list

    def update(self):
        for i in range(len(self.fish_list)):
            current_fish = self.fish_list[i]

            # Move fish
            current_fish.move()

            # Check if fish can eat other fish
            for j in range(i+1, len(self.fish_list)):
                other_fish = self.fish_list[j]
                if current_fish.direction == other_fish.direction:
                    continue

                if current_fish.eat(other_fish):
                    self.fish_list.pop(j)
                    break

if __name__ == "__main__":
    # Create fish
    fish1 = Fish(5, "right")
    fish2 = Fish(3, "left")
    fish3 = Fish(2, "right")
    fish4 = Fish(1, "left")

    # Add fish to aquarium
    aquarium = Aquarium([fish1, fish2, fish3, fish4])

    # Simulate fish movement and eating for 10 iterations
    for i in range(10):
        aquarium.update()
        print([fish.size for fish in aquarium.fish_list])

这个代码模拟了一个简单的水族馆环境，其中包含多条鱼。每条鱼有一个大小和一个移动方向（左或右）。在每个时间步长里，每条鱼都会移动，并且如果它的方向和其他鱼的方向不同，它会尝试吃掉其他鱼中大小比它小的鱼。如果它成功吃掉了一条鱼，那么它的大小会增加。每个时间步长后，程序将打印出每条鱼的大小。