Why is it different from the example on the tutorial?

Mark Lawrence breamoreboy at yahoo.co.uk
Sun Jul 6 16:25:13 CEST 2014


On 06/07/2014 14:38, rxjwg98 at gmail.com wrote:
> On Sunday, July 6, 2014 8:54:42 AM UTC-4, Tim Chase wrote:
>> On 2014-07-06 05:13, rxjwg98 at gmail.com wrote:
>>
>>> What I get on Python console:
>>
>>>
>>
>>> $ python
>>
>>> Python 2.7.5 (default, Oct  2 2013, 22:34:09)
>>
>>> [GCC 4.8.1] on cygwin
>>
>>> Type "help", "copyright", "credits" or "license" for more
>>
>>> information.
>>
>>>>>> import re
>>
>>>>>> p = re.compile('ab*')
>>
>>>    File "<stdin>", line 1
>>
>>>      p = re.compile('ab*')
>>
>>>      ^
>>
>>> SyntaxError: invalid syntax
>>
>>>>>>
>>
>>
>>
>> Are you sure that you copied/pasted that directly from the console
>>
>> instead of transcribing it with some mistake?
>>
>>
>>
>> I just did the same thing at the console and it worked perfectly
>>
>> fine
>>
>>
>>
>> $ python
>>
>> Python 2.7.3 (default, Mar 13 2014, 11:03:55)
>>
>> [GCC 4.7.2] on linux2
>>
>> Type "help", "copyright", "credits" or "license" for more information.
>>
>>>>> import re
>>
>>>>> p = re.compile('ab*')
>>
>>>>>
>>
>>
>>
>>
>>
>> -tkc
> Thanks. It did be caused by unclear copy&paste. I shall be careful in future.
>
> When I enter:
>>>> counter=100
>>>> counter
> 100
>
> When I get match result:
>
>>>> pattern='abcd'
>>>> prog = re.compile(pattern)
>>>> string='abcd'
>>>> result = prog.match(string)
>>>> result
> <_sre.SRE_Match object at 0x6ffffeda5e0>
>
>>>> result.group(0)
> 'abcd'
>
> It looks like 'result' is different from a simple 'counter' variable. I do not
> yet find the definition of 'result' object. What do you call 'result' object?
> Where can I find it (what topic would be in a tutorial)?
>
> Thanks,
>
>

 >>> help(result)
Help on SRE_Match object:

class SRE_Match(builtins.object)
  |  The result of re.match() and re.search().
etc

https://docs.python.org/3/library/re.html#module-re
https://docs.python.org/3/library/re.html#match-objects
https://docs.python.org/3/library/re.html#re.match
https://docs.python.org/3/library/re.html#re.search
https://docs.python.org/3/library/re.html#regular-expression-examples

A slight aside, would you please use the mailing list 
https://mail.python.org/mailman/listinfo/python-list or read and action 
this https://wiki.python.org/moin/GoogleGroupsPython to prevent us 
seeing double line spacing and single line paragraphs, thanks.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence

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