Re: Regular Expression with Variables.

I Did try this, i think i am not doing it right:
Could you tell what is that i am doing is wrong.
I am now not able to provide multiple Regex in the forms.RegexField using the above method.


     regex_f=r'^.*(?=.{{{MIN},{MAX}}})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!$%^&*?@#-_+=])'
     old_password = forms.RegexField(
          label='Old Password',
          widget=ShowPasswordWidget(),
          regex = regex_f.format(MIN=settings.PASSWORD_MIN_LEN, MAX=settings.PASSWORD_MAX_LEN)
                       r'.*$',
          error_messages={'invalid' : 'Password must contain at least 8 characters'
          ' with one upper case letter, one lower case letter,'
          ' one number (0-9) and one special character (!$%^&*?@#-_+=)'})
 
Previously i was using this as:
-----
   old_password = forms.RegexField(
        label='Old Password',
        widget=ShowPasswordWidget(),
        regex=r'^.*(?=.{8,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!$%^&*?@#-_+=])'
                   r'.*$',
         error_messages={'invalid' : 'Password must contain at least 8 characters'
         ' with one upper case letter, one lower case letter,'
         ' one number (0-9) and one special character (!$%^&*?@#-_+=)'})

On Thursday, May 19, 2016 at 11:26:58 AM UTC+5:30, Stephen Butler wrote:

I think I'd just use format() on the regex, being careful to escape '{' and '}':

regex_f=r'^.*(?=.{{{MIN},{MAX}}})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!$%^&*?@#-_+=])'

regex=regex_f.format(MIN=settings.MY_RE_MIN, MAX=settings.MY_RE_MAX)

On Thu, May 19, 2016 at 12:37 AM, Arun S <arun...@gmail.com> wrote:

Hi,

I have a Regular Expression something like this:
regex=r'^.*(?=.{8,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!$%^&*?@#-_+=])'
               r'.*$',

In this, i would like to read the values from the Django Setting file on the Max and Min Length and provide them as my input instead of Hard Coding.

How can a Variable be provided/escaped in a regex.
Can some one throw some light on this ?

Cheers
Arun

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