(self, type)
return None
returns True or False if the first letter of the sku is in type (a list)
        valid letters are:
        r   900 series
        e   e series
        i   i series
        s   s series
returns True or False if the first letter of the sku is in type (a list)
        valid letters are:
        r   900 series
        e   e series
        i   i series
        s   s series
returns True or False if the first letter of the sku is in type ( a list ) valid letters are : r 900 series e e series i i series s s series
def roomba_type(self, type):
        '''
        returns True or False if the first letter of the sku is in type (a list)
        valid letters are:
        r   900 series
        e   e series
        i   i series
        s   s series
        '''
        if not isinstance(type, list):
            type = [type]
        if isinstance(self.sku, str):
            return self.sku[0].lower() in type
        return None
def roomba_type ( self , type ) : if not isinstance ( type , list ) : type = [ type ] if isinstance ( self . sku , str ) : return self . sku [ 0 ] . lower ( ) in type return None