Hello!
You can also get a dictionary out of the matched groups...
import re
name = 'hello_v001.ma'
regex = '^(?P<name>.*)_[vV](?P<version>[0-9]{3})\.(?P<extension>.*)$'
# notice the ?P<version> inside of the () groups
match = re.match(regex, name)
match.groupdict()
# Result: {'version': '001', 'name': 'hello', 'extension': 'ma'} #
Although the expression gets a little bit more obscure
Cheers!
Eduardo
On Sun, May 4, 2014 at 1:41 PM, Marcus Ottosson <[email protected]>wrote:
> Very useful! Always wondered why that command was called "group" when I
> only ever got a single result back. :)
>
>
> On 4 May 2014 17:16, Eduardo Grana <[email protected]> wrote:
>
>> Hello Jeremy,
>> One thing i found very usefull is the groups method of re.match,
>> so you can get parts of the matched pattern
>> for example,
>>
>> >>> import re
>> >>> st = 'hello_v001'
>> >>> regex = '(.*)_[vV]([0-9]{3})$' # notice the ( ) to separate the parts
>> you get later, the $ represents the end of the string, the .* will match
>> anything
>> >>> re.match(regex, st)
>> <_sre.SRE_Match object at 0x01DC53C8>
>> >>> r = re.match(regex, st)
>> >>> r.groups()
>> ('hello', '001')
>>
>> Cheers!
>> Eduardo
>>
>>
>>
>>
>> On Sun, May 4, 2014 at 8:18 AM, Justin Israel <[email protected]>wrote:
>>
>>> The re module also has a case insensitive flag:
>>>
>>> re.search(r'_v\d+', 'hello_v001', re.I)
>>>
>>> You can also limit it to a 3 padded version scheme if you want to go
>>> that far:
>>>
>>> re.search(r'_v\d{3}', 'hello_v001', re.I)
>>> On May 4, 2014 11:07 PM, "Anthony Tan" <[email protected]>
>>> wrote:
>>>
>>>> If the leading 'v' is the relevant thing, would '_[Vv][0-9]+' do?
>>>>
>>>> (Its just hunting for an underscore, lowercase OR uppercase v, then a
>>>> string of numbers)
>>>> On 4 May 2014 20:47, Jeremy YeoKhoo <[email protected]> wrote:
>>>>
>>>> Hey guys,
>>>>
>>>> This should be fairly easy for you guys who know regex. If I have a
>>>> string that I want to enable versioning, so say for an example I want to
>>>> recognize a string if it contains ['v001', 'v002', etc...]
>>>> I have something like this...
>>>>
>>>> remp= re.search('[0-9]+', 'hello_v001')
>>>> print temp.group()
>>>>
>>>> but I dont want it to return when:
>>>> remp= re.search('[0-9]+', 'hello_001')
>>>> print temp.group()
>>>>
>>>> Thanks
>>>> -Jeremy
>>>>
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>>
>>
>>
>> --
>> Eduardo Graña
>> www.eduardograna.com.ar
>>
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>
>
>
> --
> *Marcus Ottosson*
> [email protected]
>
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>
--
Eduardo Graña
www.eduardograna.com.ar
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