cours-m1-eea/455-Codage_Sources/algo_code/huffman.py

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2019-02-04 14:43:31 +01:00
#!/usr/bin/python3
def get_2min(l):
min1 = 0
min2 = 1
for k in range(1,len(l)):
if l[k]<=l[min1]:
min2 = min1
min1 = k
elif l[k]<=l[min2]:
min2 = k
return min1,min2
def huffman_rec(p):
if len(p) == 2:
C = ['1','0']
print(p,C)
return C
else:
min1,min2 = get_2min(p)
min1,min2 = min(min1,min2),max(min1,min2)
print(p,min1,min2)
p_save=p.pop(min2)
p[min1] = p[min1]+p_save
C = huffman_rec(p)
C.insert(min2,C[min1]+'1')
C[min1] +='0'
p.insert(min2,p_save)
p[min1] -= p_save
return C
p = [25,20,15,12,10,8,5,5]
print(huffman_rec(p))