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Re: Newbie: Check first two non-whitespace characters

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On 31/12/2015 19:54, Karim wrote:
>
>
> On 31/12/2015 19:18, otaksoftspamtrap@gmail.com wrote:
>> I need to check a string over which I have no control for the first 2 
>> non-white space characters (which should be '[{').
>>
>> The string would ideally be: '[{...' but could also be something like
>> '  [  {  ....'.
>>
>> Best to use re and how? Something else?
>
> Use pyparsing it is straight forward:
>
> >>> from pyparsing import Suppress, restOfLine
>
> >>> mystring = Suppress('[') + Suppress('{') + restOfLine
>
> >>> result = mystring.parse(' [ { .... I am learning pyparsing' )
>
> >>> print result.asList()
>
> ['.... I am learning pyparsing']
>
> You'll get your string inside the list.
>
> Hope this help see pyparsing doc for in depth study.
>
> Karim

Sorry the method to parse a string is parseString not parse, please 
replace by this line:

 >>> result = mystring.parseString(' [ { .... I am learning pyparsing' )

Regards

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Newbie: Check first two non-whitespace characters otaksoftspamtrap@gmail.com - 2015-12-31 10:18 -0800
  Re: Newbie: Check first two non-whitespace characters MRAB <python@mrabarnett.plus.com> - 2015-12-31 18:38 +0000
  Re: Newbie: Check first two non-whitespace characters Karim <kliateni@gmail.com> - 2015-12-31 19:54 +0100
  Re: Newbie: Check first two non-whitespace characters Karim <kliateni@gmail.com> - 2015-12-31 20:05 +0100
    Re: Newbie: Check first two non-whitespace characters cassius.fechter@gmail.com - 2015-12-31 11:21 -0800
  Re: Newbie: Check first two non-whitespace characters Cory Madden <csmadden@gmail.com> - 2015-12-31 10:56 -0800
  Re: Newbie: Check first two non-whitespace characters Denis McMahon <denismfmcmahon@gmail.com> - 2015-12-31 20:35 +0000
  Re: Newbie: Check first two non-whitespace characters Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-12-31 23:25 +0000
    Re: Newbie: Check first two non-whitespace characters Steven D'Aprano <steve@pearwood.info> - 2016-01-01 12:12 +1100
  Re: Newbie: Check first two non-whitespace characters Steven D'Aprano <steve@pearwood.info> - 2016-01-01 12:23 +1100
  Re: Newbie: Check first two non-whitespace characters Random832 <random832@fastmail.com> - 2015-12-31 20:31 -0500
  Re: Newbie: Check first two non-whitespace characters Jussi Piitulainen <harvesting@is.invalid> - 2016-01-01 10:16 +0200
  Re: Newbie: Check first two non-whitespace characters Karim <kliateni@gmail.com> - 2016-01-01 10:43 +0100

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