RegEx conditional search and replace

Quote:

Quote:

>>Editor = SE.SE ('sleeping=dead sleeping.htm== sleeping<==')
>>Editor ('This parrot <a href="sleeping.htm" target="new">is

Quote:

>>Editor ( (name of htm file), (name of output file) )

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>>Sorry, yet another REGEX question. I've been struggling with trying to
>>get
>>a regular expression to do the following example in Python:
>>>
>>Search and replace all instances of "sleeping" with "dead".
>>>
>>This parrot is sleeping. Really, it is sleeping.
>>to
>>This parrot is dead. Really, it is dead.
>>>
>>>
>>But not if part of a link or inside a link:
>>>
>>This parrot <a href="sleeping.htm" target="new">is sleeping</a>. Really,
>>it
>>is sleeping.
>>to
>>This parrot <a href="sleeping.htm" target="new">is sleeping</a>. Really,
>>it
>>is dead.
>>>
>>>
>>This is the full extent of the "html" that would be seen in the text, the
>>rest of the page has already been processed. Luckily I can rely on the
>>formating always being consistent with the above example (the url will
>>normally by much longer in reality though). There may though be more than
>>one link present.
>>>
>>I'm hoping to use this to implement the automatic addition of links to
>>other
>>areas of a website based on keywords found in the text.
>>>
>>I'm guessing this is a bit too much to ask for regex. If this is the
>>case,
>>I'll add some more manual Python parsing to the string, but was hoping to
>>use it to learn more about regex.
>>>
>>Any pointers would be appreciated.
>>>
>>Martin

Quote:

>>Martin Evans wrote:
>>>Sorry, yet another REGEX question. I've been struggling with trying to
>>>get
>>>a regular expression to do the following example in Python:
>>>>
>>>Search and replace all instances of "sleeping" with "dead".
>>>>
>>>This parrot is sleeping. Really, it is sleeping.
>>>to
>>>This parrot is dead. Really, it is dead.
>>>>
>>>>
>>>But not if part of a link or inside a link:
>>>>
>>>This parrot <a href="sleeping.htm" target="new">is sleeping</a>.
>>>Really,
>>>it
>>>is sleeping.
>>>to
>>>This parrot <a href="sleeping.htm" target="new">is sleeping</a>.
>>>Really,
>>>it
>>>is dead.
>>>>
>>>>
>>>This is the full extent of the "html" that would be seen in the text,
>>>the
>>>rest of the page has already been processed. Luckily I can rely on the
>>>formating always being consistent with the above example (the url will
>>>normally by much longer in reality though). There may though be more
>>>than
>>>one link present.
>>>>
>>>I'm hoping to use this to implement the automatic addition of links to
>>>other
>>>areas of a website based on keywords found in the text.
>>>>
>>>I'm guessing this is a bit too much to ask for regex. If this is the
>>>case,
>>>I'll add some more manual Python parsing to the string, but was hoping
>>>to
>>>use it to learn more about regex.
>>>>
>>>Any pointers would be appreciated.
>>>>
>>>Martin
>>>
>>What you want is:
>>>
>>re.sub(regex, replacement, instring)
>>The replacement can be a function. So use a function.
>>>
>>def sleeping_to_dead(inmatch):
>> instr = inmatch.group(0)
>> if needsfixing(instr):
>> return instr.replace('sleeping','dead')
>> else:
>> return instr
>>>
>>as for the regex, something like
>>(<a)?[^<>]*(</a>)?
>>could be a start. It is probaly better to use the regex to recognize
>>the links as you might have something like
>>sleeping.sleeping/sleeping/sleeping.html in your urls. Also you
>>probably want to do many fixes, so you can put them all within the same
>>replacer function.