[Tutor] Regular expression on python

[Mark Lawrence]

On 15/04/2015 00:49, Alan Gauld wrote:
> On 14/04/15 13:21, Steven D'Aprano wrote:
>
>> although I would probably want to write it out in verbose mode just in
>> case the requirements did change:
>>
>>
>> r"""(?x)    (?# verbose mode)
>>      (.+?):  (?# capture one or more character, followed by a colon)
>>      \s+     (?# one or more whitespace)
>>      (\d+)   (?# capture one or more digits)
>>      (?:     (?# don't capture ... )
>>        \s+       (?# one or more whitespace)
>>        \(.*?\)   (?# anything inside round brackets)
>>        )?        (?# ... and optional)
>>      \s*     (?# ignore trailing spaces)
>>      """
>>
>> That's a hint to people learning regular expressions: start in verbose
>> mode, then "de-verbose" it if you must.
>
> New one on me. Where does one find out about verbose mode?
> I don't see it in the re docs?
>
> I see an re.X flag but while it seems to be similar in purpose
> yet it is different to your style above (no parens for example)?
>

https://docs.python.org/3/library/re.html#module-contents re.X and 
re.VERBOSE are together.

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

Mark Lawrence