[Tutor] swapping list elements based on some criterion

[Emad Nawfal (عمـ نوفل ـاد)]

2011/10/8 Emad Nawfal (عمـ نوفل ـاد) <emadnawfal at gmail.com>

> Hi Steven ans Tutors,
> Thanks for the code.
> Actually I'm not a student at all. I'm an assistant professor of Arabic at
> Suez Canal University in Egypt. I would appreciate more contributions from
> you and the other list members.
>
>
> 2011/10/8 Steven D'Aprano <steve at pearwood.info>
>
>> Emad Nawfal (عمـ نوفل ـاد) wrote:
>>
>>> Hello Tutors,
>>> It's been quite some time since I last posted something here, and now I'm
>>> back with a question:
>>>
>>> I want to re-structure English so that the adjectives appear after the
>>> nouns, instead of before.
>>> If I have a sentence like:
>>>
>>> The tall man plays well
>>> I need to change it to
>>> The man tall plays well
>>> So far, I have thought of the following function, but I'm not sure it's
>>> the
>>> best solution. It assumes that the sentence has been augmented with part
>>> of
>>> speech tags
>>> (Also plz note that there may be multiple adjectives)
>>>
>>
>> And what do you expect to happen with multiple adjectives?
>>
>> "the tall fat bald man"
>>
>> => "the man tall fat bald"
>> => "the man fat tall bald"
>> => "the man bald fat tall"
>> => "the man fat bald tall"
>> => something else?
>>
>> The approach I would take is this:
>>
>>
>> Walk along the sentence, inspecting each word.
>> Collect all consecutive adjectives into a list of adjectives
>> Other words get copied straight into the buffer.
>> When you reach a noun, copy the noun into the buffer, plus the list
>>  of adjectives (in whichever order you like!), then clear the list
>>  of adjectives ready for the next noun.
>>
>> Does that help?
>>
>> Something like this:
>>
>> def swap(sentence):
>>    buffer = []
>>    adjectives = []
>>    for word in sentence.split():
>>        if word.endswith('/ADJ'):
>>            adjectives.append(word)
>>        elif word.endswith('/N'):
>>            buffer.extend(adjectives)
>>            buffer.append(word)
>>            adjectives = []
>>        else:
>>            buffer.append(word)
>>    return ' '.join(buffer)
>>
>>
>> P.S. Since this looks like homework, I have left a deliberate mistake in
>> my code for you to fix. But it should be easy to fix if you study the code
>> and think about what it is doing.
>>
>>
>> --
>> Steven
>> ______________________________**_________________
>> Tutor maillist  -  Tutor at python.org
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>>
>
>
>
> --
> لا أعرف مظلوما تواطأ الناس علي هضمه ولا زهدوا في إنصافه كالحقيقة.....محمد
> الغزالي
> "No victim has ever been more repressed and alienated than the truth"
>
> Emad Soliman Nawfal
> Indiana University, Bloomington
> --------------------------------------------------------
>

Hi Steven,
Thanks again for the recipe and for leaving an error in the function. This
forced me to use my mind a little bit.

Here is the function as I used it, and it works fine:

def swap(sentence):
   buffer = []
   adjectives = []
   for word in sentence.split():
       if word.endswith('/ADJ'):
           adjectives.append(word)
       elif word.endswith('/N'):
           buffer.append(word)
           buffer.extend(adjectives)

           adjectives = []
       else:
           buffer.append(word)
   return ' '.join(buffer)

and SORRY for top-posting in the previous email.
-- 
لا أعرف مظلوما تواطأ الناس علي هضمه ولا زهدوا في إنصافه كالحقيقة.....محمد
الغزالي
"No victim has ever been more repressed and alienated than the truth"

Emad Soliman Nawfal
Indiana University, Bloomington
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