[BangPypers] Question on Pattern Matching and Regular Expression

[Dhruv Baldawa]

Sorry, I just hit the TAB key, and the message got delivered.
I am not sure if this is what you want. If it is then to accomplish this,
you will need to read the entire file first, and then compile the regex.
Iterate using finditer(), and take the groupdict() to get all the values.
Also, I have typecasted the values to int.

--
Dhruv Baldawa
(http://www.dhruvb.com)


On Tue, Jan 8, 2013 at 12:27 AM, Dhruv Baldawa <dhruvbaldawa at gmail.com>wrote:

> regex = """#
> #(?P<city>[a-zA-Z]+)
> #
> Population = (?P<population>\d+)cr
> Temperature = (?P<temperature>\d+) deg cel
> Area = (?P<area>\d+) sqft"""
>
> regex = re.compile(regex, flags=re.MULTILINE)
>
> print regex.findall(rstr)
> # >>> [('Delhi', '7', '10', '13000'), ('Mumbai', '10', '30', '132000')]
>
> for x in regex.finditer(rstr):
>     group = x.groupdict()
>     data[group['city']] = {'area': int(group['area']),
> 'population': int(group['population']), 'temperature':
> int(group['temperature'])}
>
>
> In [14]: data
> Out[14]:
> {'Delhi': {'area': 13000, 'population': 7, 'temperature': 10},
>  'Mumbai': {'area': 132000, 'population': 10, 'temperature': 30}}
>
> --
> Dhruv Baldawa
> (http://www.dhruvb.com)
>
>
> On Tue, Jan 8, 2013 at 12:02 AM, Rahul R <rahul8590 at gmail.com> wrote:
>
>> Hey David,
>>
>> Assuming , its not a continuous stream of data being written to file all
>> the time. you could do something like this
>> https://gist.github.com/4477268 .
>> you can enhance it and make it more pythonic. :)
>>
>> Thanks,
>> Rahul
>>
>>
>>
>>
>>
>> On Mon, Jan 7, 2013 at 5:02 PM, davidsnt <davidsnt at gmail.com> wrote:
>>
>> > No this file changes very often, like once in 5 minutes and the values
>> are
>> > updated, also there is no way I can move it to a database.
>> >
>> > Regards,
>> > Davidsanthosh L
>> >
>> >
>> > On Mon, Jan 7, 2013 at 4:55 PM, Amit Sethi <amit.pureenergy at gmail.com
>> > >wrote:
>> >
>> > > On Mon, Jan 7, 2013 at 3:52 PM, davidsnt <davidsnt at gmail.com> wrote:
>> > > > Gora,
>> > > >
>> > > > Can you help me with few links that you have handy to which I can
>> refer
>> > > to
>> > > > build a parser instead of RE
>> > > Can you elaborate on the idea of "build a parser" , in any case you
>> > > will have to use regex.
>> > >
>> > > >  I also need this app to be
>> > > >able to do a search in the file based on the title.
>> > > What kind of file are you are working with , How often does it change?
>> > >  It might be good move the data to a database in case file does not
>> > > change very often .
>> > >
>> > > --
>> > > A-M-I-T S|S
>> > > _______________________________________________
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