41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
#
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# Sam Hadow - Huffman-py
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# Copyright (C) 2023
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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def calcul_code(node, value = '', les_codes = None):
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# on crée le dict des codes s'il n'existe pas encore (lors du premier passage dans la fonction)
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if les_codes == None:
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les_codes = dict()
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# gérer le cas où on a qu'un seul noeud, on lui attribuera le code 0 par défaut
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# à noter que dans ce cas là l'algorithme d'Huffman pour la compression est peu utile
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if(not node.left and not node.right):
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les_codes[node.lettres] = "0"
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return les_codes
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#code pour le sommet actuel
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newValue = value + str(node.code)
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if(node.left):
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calcul_code(node.left, newValue, les_codes)
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if(node.right):
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calcul_code(node.right, newValue, les_codes)
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if(not node.left and not node.right):
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les_codes[node.lettres] = newValue
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return les_codes
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