AttributeError：“tuple”对象没有属性“”lower“”sentiword“”

# 错误的示例
my_tuple = ("Hello", "World")
print(my_tuple.lower())  # 这会引发 AttributeError

# 正确的示例
my_string = "Hello World"
print(my_string.lower())  # 这会正常工作

my_tuple = ("Hello", "World")
for word in my_tuple:
    print(word.lower())

# 错误的示例
sentiword = ("positive", "negative")
print(sentiword.lower())  # 这会引发 AttributeError

# 正确的示例
sentiword = "positive"
print(sentiword.lower())  # 这会正常工作

my_variable = ("Hello", "World")
print(type(my_variable))  # 输出: <class 'tuple'>
print(my_variable)  # 输出: ('Hello', 'World')