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From: timo verbeek on 15 May 2010 07:02
I'm planning to create a human word program
A human inputs a string
"Give me the weather for London please."
Then I will strip the string.
"weather for london"
Then I get the useful information.
what:"weather" where:"london"
After that I use the info.

I need help with getting the useful information how do I get the place
if I don't now how long the string is?
From: timo verbeek on 15 May 2010 07:32
On May 15, 1:02 pm, timo verbeek <timoverbee...(a)gmail.com> wrote:
Place starts always with for

From: superpollo on 15 May 2010 08:35
timo verbeek ha scritto:
> I'm planning to create a human word program
> A human inputs a string
> "Give me the weather for London please."
> Then I will strip the string.
> "weather for london"
> Then I get the useful information.
> what:"weather" where:"london"
> After that I use the info.
>
> I need help with getting the useful information how do I get the place
> if I don't now how long the string is?


>>> query = "Give me the weather for London please."
>>> what = query.strip("Give me the ").split()[0]
>>> where = query.strip("Give me the " + what + " for ").split()[0]
>>> print what, where
weather London
>>>
From: superpollo on 15 May 2010 08:55
superpollo ha scritto:
> timo verbeek ha scritto:
>> I'm planning to create a human word program
>> A human inputs a string
>> "Give me the weather for London please."
>> Then I will strip the string.
>> "weather for london"
>> Then I get the useful information.
>> what:"weather" where:"london"
>> After that I use the info.
>>
>> I need help with getting the useful information how do I get the place
>> if I don't now how long the string is?
>
>
> >>> query = "Give me the weather for London please."
> >>> what = query.strip("Give me the ").split()[0]
> >>> where = query.strip("Give me the " + what + " for ").split()[0]
> >>> print what, where
> weather London
> >>>

maybe better not with strip, fot it might not do what i intended (see
docs); maybe preferable to use "partition" method:

>>> query = "Give me the weather for London please."
>>> what = query.partition("Give me the ")[2].split()[0]
>>> where = query.partition(" for ")[2].split()[0]
>>> print what, where
weather London
>>>
From: David Zaslavsky on 15 May 2010 17:13
Here's my take on that:

loc = re.search('for\s+(\w+)', string).group(1)

Not much different, really, but it does allow for multiple spaces (\s+) as
well as requiring at least one character in the word (\w+), and I use a
matching group to extract the location directly instead of splitting the
string "by hand".

:) David

On Saturday 15 May 2010 8:38:01 am Xavier Ho wrote:
> On Sat, May 15, 2010 at 9:32 PM, timo verbeek
<timoverbeek10(a)gmail.com>wrote:
> > On May 15, 1:02 pm, timo verbeek <timoverbee...(a)gmail.com> wrote:
> > Place starts always with for
>
> Okay, much better.
>
> Given that constraint, it looks like regular expression can do the job. I'm
> not very experienced with regex, though.
>
> \w* matches a whole word composed of letters and numbers by default.
>
> >>> result = re.search('for \w*', 'Give me the weather for London please.')
> >>> result.group()
>
> 'for London'
>
> >>> result.group().split()[1]
>
> 'London'
>
> Cheers,
> Xav
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