Human word reader

[CM]

> > I need help with getting the useful information how do I get the place
> > if I don't now how long the string is?
>
>         And is it supposed to handle
>
>         for london give the weather to me
>         for the london weather give me
>
> ...
>
>         Do a search on "natural language processing"... You are at the level
> of algorithms, and algorithms are not limited to Python...

Yes, this is a major field of research.  For basic purposes in Python,
maybe just try to trigger off the presence of the word "weather" and
the presence of a particular city's name.  It will not work if the
user tries to trick it ("Don't give me the weather in London"), but,
like a search engine, it will more or less give what people want for
common queries.  Like:

list_of_cities = ['london', 'moscow', 'new york', 'paris']
user_string = 'Give me the weather for London please.'
user_word_list = user_string.split()  #if they put a comma after city,
this will be a problem
for word in user_word_list:
    period_free_word = word.rstrip('.') #strips trailing period for
final word, in case there
    lowered_word = period_free_word.lower()  #makes it case
insensitive
    if lowered_word in list_of_cities:
         print 'The city is: ' + lowered_word
         DoSomething(lowered_word)  #go and get the weather data for
that city I guess

Che