regex not working in python

Question

I am working on writing a regex for phonenumber. I have made a very basic regex for matching a phone number.

^[-+[:blank:][:digit:]]*$.

But that one in not working in python. If I try the same regex on someother tool for example text edit for regex search then its working. I am pretty new to regex so will be great if I can get some help.

Thanks

what are the exact allowed chars in your phone number other than digits? — Raheel Hasan
– Raheel Hasan, Commented Apr 15, 2013 at 12:29
Does Python support [:blank:][:digit:]? If not, you may want to replace them with [-+ \d]. — Loamhoof
– Loamhoof, Commented Apr 15, 2013 at 12:30

Raheel Hasan · Accepted Answer · 2013-04-15 12:37:06Z

3

try this (say your allowed phone no length is 10 to 15 digits):

/^[0-9\-\+\s]{10,15}$/

.

This will allow in:

1) numbers (0-9)

2) space

3) dash sign "-"

4) plus sign "+"

This is not a strict enforcing. To have exact strict format, you may need to alter as per your need.

edited Apr 15, 2013 at 12:37

answered Apr 15, 2013 at 12:31

Raheel Hasan

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5 Comments

Torxed Over a year ago

Additional information: docs.python.org/2/library/re.html#regular-expression-syntax is a good way to start, for instance + is an operator and must be escaped ;)

hjelpmig Over a year ago

I did that but since I am new to stackoverflow and my reputation is just 1 so I cant voteup. :(

Alan Moore Over a year ago

@Torxed, the plus sign doesn't need escaping when it's inside a character class. Neither does the hyphen, if you place it carefully. [0-9+\s-] works just fine.

Torxed Over a year ago

@AlanMoore what do you know, it works :) Thank you for pointing that out :)

Raheel Hasan Over a year ago

escaping doesnt cause any error. Even if not needed, its better to use it just to be sure.

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