how to built list-decoder ?
 
  
 
  
 
 
 
 
 
 
    
        
        asked 0 years ago  
 
 saraf87 gravatar image  
 
 
 
 
    
        
        updated 0 years ago  
 
 Emmanuel Charpentier gravatar image  
 
 
 
 
 
refer to this page: I'm not allowed to put a link. just google : Decoders sagemath
 
I'm trying to specify the type of the decoder to be list-decoder: The decoder outputs a list of likely codewords, instead of just a single codeword. I'm not sure how to pass it. 
 
D = C.decoder()
D.decoder_type() # output:  {'complete', 'hard-decision', 'might-error'}
 
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I tried this, gives me no error but it did not return list of codewords
 
D = C.decoder()
D.decoder_type = {'list-decoder'}
print (D).           # output : Syndrome decoder for [16, 4] Goppa code over GF(2) handling errors of weight up to 6
 
when I tried to check its type, it gives me error
 
D.decoder_type() #   TypeError: 'set' object is not callable
 
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Edited for legibility.
Note : in Python/Sage, a comment is introduced by #, not \\ ; I edited suitably...
Emmanuel Charpentier gravatar imageEmmanuel Charpentier (
    
        0 years ago
    )
Please provide a complete code example.
Max Alekseyev gravatar imageMax Alekseyev (
    
        0 years ago
    )
1
The error itself is easy to explain. By making assignment D.decoder_type = {'list-decoder'}, you overwrite the method value of D.decoder_type with the set value. Hence, calling D.decoder_type() is impossible after such an assignment.
Max Alekseyev gravatar imageMax Alekseyev (
    
        0 years ago
    )
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