Python正则表达式替换锚点

Question

我正在尝试重写在此答案中看到的代码：

import re

pat1 = re.compile(r"(^|[\n ])(([\w]+?://[\w\#$%&~.\-;:=,?@\[\]+]*)(/[\w\#$%&~/.\-;:=,?@\[\]+]*)?)", re.IGNORECASE | re.DOTALL)

pat2 = re.compile(r"#(^|[\n ])(((www|ftp)\.[\w\#$%&~.\-;:=,?@\[\]+]*)(/[\w\#$%&~/.\-;:=,?@\[\]+]*)?)", re.IGNORECASE | re.DOTALL)


urlstr = 'http://www.example.com/foo/bar.html'

urlstr = pat1.sub(r'\1<a href="\2" target="_blank">\3</a>', urlstr)
urlstr = pat2.sub(r'\1<a href="http:/\2" target="_blank">\3</a>', urlstr)

print urlstr

具体来说，我尝试了这个：

pattern = re.compile('<a href="javascript:rt\(([0-9]+)\)">Download</a>');

rawtable = pattern.sub(r'\1', rawtable) 

我想替换这样的地方：

<a href="javascript:rt(2061)">Download</a>

有了这个：

2061

我想这样做：

<a href="#" onclick="javascript:ra('Name of object one')"
  title="Some title Text">Name of Object two</a>

只是

Name of Object two

通过做

pattern = re.compile('<a href="#" onclick="javascript:ra\('(:?[a-zA-Z0-9 +)'\)" title="Some title Text">([a-zA-Z0-9 ]+)</a>');

rawtable = pattern.sub(r'\1', rawtable) 

但它也不起作用。 有小费吗？

Answer 1

我想替换这样的地方：

 <a href="javascript:rt(2061)">Download</a> 

您的第一个代码有效。 在这里测试

---

我想这样做：

 <a href="#" onclick="javascript:ra('Name of object one')" title="Some title Text">Name of Object two</a>` 

至于第二个，请检查我在这里标记的内容：

pattern = re.compile('<a href="#" onclick="javascript:ra\('(:?[a-zA-Z0-9 +)'\)" title="Some title Text">([a-zA-Z0-9 ]+)</a>');
                                                          | | |         |  ^ unescaped quote (in the string passed to re.compile() )
                                                          | | |         |
                                                          | | ^---------^ you didn't close the character class (as in [a-z]).. add a "]"
                                                          | ^ correct syntax is (?: pattern ) ... However, no point in using it here
                                                          ^ another unescaped quote

码：

#python 3.4.3
import re;

rawtable = '<a href="#" onclick="javascript:ra(\'Name of object one\')" title="Some title Text">Name of Object two</a>';

pattern = re.compile('<a href="#" onclick="javascript:ra\(\'[a-zA-Z0-9 ]+\'\)" title="Some title Text">([a-zA-Z0-9 ]+)</a>');

rawtable = pattern.sub(r'\1', rawtable);
print(rawtable);

运行此代码

输出：

Name of Object two