Regular Expressions¶
Let’s first create the regex field.
>>> from z3c.schema.regex import Regex
>>> regex = Regex()
The regex field only allows compilable regular expressions.
>>> regex.validate(r'.*')
>>> regex.validate(r'^\s+$')
It does not validate regular expressions that do not compile.
>>> regex.validate('(i')
Traceback (most recent call last):
...
InvalidRegex: '(i', unbalanced parenthesis
When used to process input, only valid values are returned.
>>> regex.fromUnicode(u'.*')
'.*'
>>> regex.fromUnicode(u'(i')
Traceback (most recent call last):
...
InvalidRegex: '(i', unbalanced parenthesis