automaton.accessible

Create a new automaton from the accessible part of the input, i.e., the subautomaton whose states can be reached from an initial state.

Preconditions:

Postconditions:

Examples



In [1]:

    
import vcsn

The following automaton has one unreachable state:



In [2]:

    
%%automaton a
context = "lal_char(abc), b"
$ -> 0
0 -> 1 a
1 -> $
2 -> 0 a
1 -> 3 a



In [3]:

    
a.is_accessible()









    Out[3]:





False

Calling accessible returns a copy of the automaton without non-accessible states:



In [4]:

    
a.accessible()









    Out[4]:



In [5]:

    
a.accessible().is_accessible()









    Out[5]:





True