试图从.txt中查找平均值，但我一直收到ValueError:无法将字符串转换为浮点型：'‘

def find_average(file_path):
    try:
        with open(file_path, 'r') as file:
            data = file.readlines()
            data = [float(item.strip()) for item in data]  # 转换为浮点型列表

        average = sum(data) / len(data)
        return average
    except ValueError as e:
        print("数值转换错误:", e)
    except FileNotFoundError:
        print("文件不存在")
    except Exception as e:
        print("发生错误:", e)

file_path = 'data.txt'
average_value = find_average(file_path)
if average_value:
    print("平均值:", average_value)