(value)
return Criterion(name='username', predicate=regexp_predicate(value))
Return a Criterion which matches the given regular expression string
    against the ``"username"`` attribute.
Return a Criterion which matches the given regular expression string
    against the ``"username"`` attribute.
Return a Criterion which matches the given regular expression string against the username attribute .
def username_criterion(value):
    """
    Return a Criterion which matches the given regular expression string
    against the ``"username"`` attribute.
    """
    return Criterion(name='username', predicate=regexp_predicate(value))
def username_criterion ( value ) : return Criterion ( name = 'username' , predicate = regexp_predicate ( value ) )