1

I want my string only have ([email protected]_) but when using this code:

import re
e='p12/[email protected]'
p=re.compile(r'[[email protected]_]')
for ele in e:
    if bool(p.search(ele)):
        print('okay')
    else:
        print('n')

it prints 'okay' but I expect to print 'n' because my string(e) contains '/' and I didn't declare it on my regex. what should I do? I also used re.match and didn't help me either.

Mureinik
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parsap1378
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1 Answers1

3

There are a couple of issues here. First . and - are meta-characters, and need to escaped with a \. Second, you don't really need the loop here - add a * to indicate any number of these characters, and qualify the regex between ^ and $ to signify the entire string needs to be made up of these characters:

import re
e = 'p12/[email protected]'
p = re.compile(r'^[a-zA-Z0-9@\.\-_]*$')

if p.match(e):
    print('okay')
else:
    print('n')
Mureinik
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    Oh I didn't know about meta-characters. anything other than alphabets and numbers is meta-character? – parsap1378 Jan 01 '21 at 22:35
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    @parsap1378 You can find a full list with explanations about all the special characters in `re`'s documentation: https://docs.python.org/3/library/re.html – Mureinik Jan 01 '21 at 22:38