https://www . geeksforgeeks . org/converting-a-10 位数电话号码-us-format-use-regex-in-python/ 文本预处理是自然语言处理中最重要的任务之一。您可能想从字符串中提取数字。为这样的处理任务编写一个手动脚本需要大量的努力,而且在大多数时候它很容易出错。考虑到这些预处理任务的重要性,正则表达式的概念已经...
原文:https://www.geeksforgeeks.org/nlp-regex-and-affix-tagging/ 正则表达式匹配用于标记单词。考虑这个例子,数字可以与\d 匹配来分配标签 CD(指基数)。或者可以匹配已知的单词模式,例如后缀“ing”。理解概念–RegexpTagger 是 SequentialBackoffTagger 的一个子类。它可以位于 DefaultTagger 类之前,以便标记 n-...
A positive lookahead asserts what is directly following the current position in the string but doesn’t consume any characters. The syntax is(?=...). Find Text followed by a Space For example, to find items that have ‘apple’ followed by a space: positive_lookahead_query = df.query("it...
Python: https://github.com/daviddrysdale/python-phonenumbers Ruby: https://github.com/sstephenson/global_phone C#: https://github.com/twcclegg/libphonenumber-csharp Objective-C: https://github.com/iziz/libPhoneNumber-iOS JavaScript: https://github.com/ruimarinho/google-libphonenumber Elixir: https...