def __init__(self, min_length=None, max_length=None, **kwargs):
        """
        :param int min_length: Sets the minimum length of this string, for validation purposes.
            Defaults to 1 if this is a ``required`` column. Otherwise, None.
        :param int max_length: Sets the maximum length of this string, for validation purposes.
        """
        self.min_length = (
            1 if min_length is None and kwargs.get('required', False)
            else min_length)
        self.max_length = max_length

        if self.min_length is not None:
            if self.min_length < 0:
                raise ValueError(
                    'Minimum length is not allowed to be negative.')

        if self.max_length is not None:
            if self.max_length < 0:
                raise ValueError(
                    'Maximum length is not allowed to be negative.')

        if self.min_length is not None and self.max_length is not None:
            if self.max_length < self.min_length:
                raise ValueError(
                    'Maximum length must be greater or equal '
                    'to minimum length.')

        super(Text, self).__init__(**kwargs)
def __init__ ( self , min_length = None , max_length = None , ** kwargs ) : self . min_length = ( 1 if min_length is None and kwargs . get ( 'required' , False ) else min_length ) self . max_length = max_length if self . min_length is not None : if self . min_length < 0 : raise ValueError ( 'Minimum length is not allowed to be negative.' ) if self . max_length is not None : if self . max_length < 0 : raise ValueError ( 'Maximum length is not allowed to be negative.' ) if self . min_length is not None and self . max_length is not None : if self . max_length < self . min_length : raise ValueError ( 'Maximum length must be greater or equal ' 'to minimum length.' ) super ( Text , self ) . __init__ ( ** kwargs )
:param int min_length: Sets the minimum length of this string, for validation purposes.
            Defaults to 1 if this is a ``required`` column. Otherwise, None.
        :param int max_length: Sets the maximum length of this string, for validation purposes.