# 定义字符串变量
info= "label_data"

# 输出原始字符串
print("原始字符串：")
print(  info      )
# 转小写并输出
lower_info = info.lower()
print("小写：",  lower_info        )
# 转大写并输出
upper_info = info.upper()
print("大写：",  upper_info      )
# 输出长度
print("长度：",  len    (info))
# 逆序并输出
reverse_info = info  [::-1]       
print("逆序：",   reverse_info        )