如何从文本数据中提取子列表

提取文本数据中的子列表可以通过各种方式实现，具体取决于文本数据的结构和提取子列表的条件。例如：使用字符串操作和条件判断、使用正则表达式、使用自然语言处理工具、使用自定义解析器等几种模式，那么对于在日常使用中会有那些问题呢？一起跟着我了解下。

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1、问题背景

我们有一个文本文件，其中包含多种信息，如名言、事实和宠物信息。我们需要将这些信息提取出来，并将其分为三个子列表：名言列表、事实列表和宠物列表。

我们使用了一个简单的Python脚本来读取文本文件并将其分割成多个子列表。代码如下：

contents = open("data.dat").read()
data = contents.split('*') #split the data at the '*'

newlist = [item.split("-") for item in data if item]

但是，当我们运行这段代码时，发现它不仅分割了文本文件中的数据，还分割了文本文件中的换行符(“\n\n”)。这导致我们得到了一个错误的子列表结构。

2、解决方案

为了解决这个问题，我们需要在分割文本文件时，忽略换行符。我们可以使用Python的strip()方法来删除字符串中的空白字符。

修改后的代码如下：

contents = open("data.dat").read()
data = contents.split('*') #split the data at the '*'

newlist = [item.strip() for item in data if item]

这样，我們就可以正确地分割文本文件中的数据，并将其分为三个子列表：名言列表、事实列表和宠物列表。

代码示例：

contents = open("data.dat").read()
data = contents.split('*') #split the data at the '*'

newlist = [item.strip() for item in data if item]

for item in newlist:
    print(item)

输出结果：

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