使用RE掃描儀查找雙引號內容？

Question

有沒有一種方法可以使用以下（無證）re.Scanner查找雙引號內的所有內容，以便將這種匹配分類爲字符串？

scanner = re.Scanner([ 
(r"[-10-9]+", lambda scanner, token:("INTEGER", int(token))), 
(r"[A-Za-z]+", lambda scanner, token:("NAME", str(token))), 
(r"[:true::false:]+", lambda scanner, token:("BOOL", token)), 
(r"[:error:]+", lambda scanner, token:("ERROR", token)), 
(r'.', lambda scanner, token: None), 
]) 

Answer 1

你可以簡單的字符串正則表達式添加到掃描儀這樣的：

>>> import re 
>>> scanner = re.Scanner([ 
(r"[-10-9]+", lambda scanner, token:("INTEGER", int(token))), 
(r"[A-Za-z]+", lambda scanner, token:("NAME", str(token))), 
(r"[:true::false:]+", lambda scanner, token:("BOOL", token)), 
(r"[:error:]+", lambda scanner, token:("ERROR", token)), 
(r'".*?"', lambda scanner, token:("STRING", token)), # added STRING regex 
(r'.', lambda scanner, token: None), 
]) 

現在你可以測試一下：

>>> i = '"string"' # simulated input 
>>> t = '"this is a very long string with whitespace"' # another simulated input 
>>> scanner.scan(i) 
([('STRING', '"string"')], '') # ([(token_label, match)], remainder_of_string) 
>>> scanner.scan(t) 
([('STRING', '"this is a very long string with whitespace"')], '')