如何从Python元组或列表中提取字符串？

# 示例元组
tuple_example = ('Hello', 123, 'World')

# 提取第一个字符串
first_string_tuple = tuple_example[0]  # 输出: 'Hello'

# 示例列表
list_example = ['Hi', 456, 'There']

# 提取第一个字符串
first_string_list = list_example[0]  # 输出: 'Hi'

# 示例元组
tuple_example = ('Hello', 123, 'World', 789)

# 提取所有字符串
strings_from_tuple = [item for item in tuple_example if isinstance(item, str)]
# 输出: ['Hello', 'World']

# 示例列表
list_example = ['Hi', 456, 'There', 0]

# 提取所有字符串
strings_from_list = [item for item in list_example if isinstance(item, str)]
# 输出: ['Hi', 'There']

# 示例元组
tuple_example = ('Hello', 123, 'World')

# 提取所有字符串
strings_from_tuple = list(filter(lambda x: isinstance(x, str), tuple_example))
# 输出: ['Hello', 'World']

# 示例列表
list_example = ['Hi', 456, 'There']

# 提取所有字符串
strings_from_list = list(filter(lambda x: isinstance(x, str), list_example))
# 输出: ['Hi', 'There']

if index < len(data_structure):
    string = data_structure[index]

if isinstance(item, str):
    # 处理字符串