def calculate_fitness(self): fitness = 0 for i in range(POPULATION_SIZE): gene = self.genes[i] # 判断树是否超出土地边界 if gene['x'] - TREE_RADIUS < 0 or gene['x'] + TREE_RADIUS > LAND_WIDTH or gene['y'] - TREE_RADIUS < 0 or \ gene['y'] + TREE_RADIUS > LAND_HEIGHT: continue怎么缩进

你可以用4个空格进行缩进，这是Python官方文档推荐的方法。例如：

def calculate_fitness(self):
    fitness = 0
    for i in range(POPULATION_SIZE):
        gene = self.genes[i]
        # 判断树是否超出土地边界
        if gene['x'] - TREE_RADIUS < 0 or gene['x'] + TREE_RADIUS > LAND_WIDTH or gene['y'] - TREE_RADIUS < 0 or gene['y'] + TREE_RADIUS > LAND_HEIGHT:
            continue
        # 进一步计算fitness
        # ...
        # ...

注意缩进的空格数要保持一致，不要混用空格和Tab键。