[Tutor] use of raw strings with regular expression patterns

[Alan Gauld]

On 06/11/2020 18:56, Manprit Singh wrote:
> Dear Sir ,
> 
> I have tried to find all matches in a string that starts with a (.), then
> the next character  is a lowercase alphabet and then a digit.
> 
> s = "a.b.c.d1.1ef.g5"
> re.findall('\.[a-z][0-9]', s)
> 
> is the way i have used the RE patterns  ok ?

What does the interpreter say?
>>> s = "a.b.c.d1.1ef.g5"
>>> import  re
>>> re.findall('\.[a-z][0-9]', s)
['.d1', '.g5']
>>>

Apparently it is.
Although, from your earlier email, you should probably
use a raw string

>>> re.findall(r'\.[a-z][0-9]', s)
['.d1', '.g5']

However, in this case it makes no difference.

-- 
Alan G
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