[Tutor] use of raw strings with regular expression patterns

[Alan Gauld]

On 06/11/2020 17:03, Manprit Singh wrote:
> Dear sir ,
> 
> As you know there are some special characters in regular expressions , like
> :
> \A, \B, \b, \d, \D, \s, \S, \w, \W, \Z
> 
> is it necessary to use raw string notation like r'\A' while using  re
> patterns made up of these characters ?

It's not necessary in the sense that Python will allow you
not to. But it is *very strongly recommended*, otherwise some
unexpected results are likely.


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Alan G
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