| The standard L-system. 
        
            | Methods |  |  
        | __getitem__ __init__
 __len__
 __repr__
 __str__
 reset
 step
 
 |  
            |  | __getitem__ |  
        | 
__getitem__ ( self,  index )
 |  
            |  | __init__ |  
        | 
__init__ (
        self,
        axiom=None,
        rules=None,
        )
 |  
            |  | __len__ |  
        | 
__len__ ( self )
 |  
            |  | __repr__ |  
        | 
__repr__ ( self )
 |  
            |  | __str__ |  
        | 
__str__ ( self )
 |  
            |  | reset |  
        | 
reset ( self )
 Reset the system to its axiom. |  
            |  | step |  
        | 
step ( self )
 Execute one generation of the system. |  |