Question

我想从封闭字符«和»之外的所有子字符串中获取所有双引号，然后将其替换为转义字符，然后是双引号，即。 \“例如

输入字符串：

'The first generally recognized "wiki" application,«"WikiWikiWeb"», was created by American computer programmer "Ward Cunningham" in 1994'

预期输出：

'The first generally recognized \"wiki\" application,«"WikiWikiWeb"», was created by American computer programmer \"Ward Cunningham\" in 1994'

我尝试了以下代码。

string = '''The first generally recognized "wiki" application,«"WikiWikiWeb"», was created by American computer programmer "Ward Cunningham" in 1994'''

import re
arr = re.findall(r'(.*?)\«.*?\»', string)
for tag in arr :
 new_tag = tag.replace('"','\\"')
 string = string.replace(tag, new_tag)

Output: The first generally recognized \"wiki\" application,«"WikiWikiWeb"», was created by American computer programmer "Ward Cunningham" in 1994

此代码的问题是正则表达式没有给我所有的子字符串，在这种情况下是第二个子字符串，即。预期结果必须是：

[“第一个公认的“维基”应用程序”，是由美国计算机程序员“沃德·坎宁安”于1994年创建的。”

我想要正则表达式，它应该给我所有来自子字符串的引号，而不是给括起来的特殊字符之外的子字符串本身。

Answer 1

string = '''The first generally recognized "wiki" application,«blah"WikiWikiWeb"blah», was created by American computer programmer "Ward Cunningham" in 1994'''

import re
arr = re.findall(r'«.*?»|(".+?")', string)
for tag in arr :
  new_tag = tag.replace('"','\\"')
  string = string.replace(tag, new_tag)

print string

输出：

The first generally recognized \"wiki\" application,«blah"WikiWikiWeb"blah», was created by American computer programmer \"Ward Cunningham\" in 1994

Answer 2

您可以将这种模式用于正则表达式：

string = re.sub(r'(?<!\«)"(?!\»)','\\"',string)

(?<!«)是负向后看，表示找到“，后面没有« 和 (?!»)是负向前行，效果相同，但向后工作

获取用特殊字符«和»括起来的字符串之外的所有双引号字符

2 个答案: