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Julianne Cocq
TP2_sd
Commits
9dfae198
Commit
9dfae198
authored
2 months ago
by
Soltane Maxime
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construction_mphf
parent
b1daae63
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tp_2_miso_mphf.py
+15
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tp_2_miso_mphf.py
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tp_2_miso_mphf.py
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9dfae198
...
...
@@ -33,21 +33,35 @@ def construction_mphf(set_kmer, n, gamma=2, nb_niveaux=3):
True
"""
# Initialisation
# on copie le contenu de set_kmer dans set_kmer_courant
set_kmer_courant
=
set_kmer
.
copy
()
# on crée un tableau vide
tableaux
=
[]
# structure vide qui contiendra les collisions
collision
=
set
()
# on parcours tous les niveaux
for
_
in
range
(
nb_niveaux
):
# si la longueur du nombre de k_mers est positive == verifie que la liste n'est pas vide
if
len
(
set_kmer_courant
)
>
0
:
# on définit la longueur de la liste as l
l
=
len
(
set_kmer_courant
)
# on initialise un tableau (une place pour chaque valeur) de taille double (gamma = 2) par rapport au nombre de valeurs
tableau_principal
=
[
-
1
]
*
(
gamma
*
l
)
# on parcourt la liste de k_mers
for
kmer
in
set_kmer_courant
:
pass
# compléter
# hacher le k-mer (attention, hash() peut rendre des entiers signés, nous voulons des entiers positifs)
h
=
abs
(
hash
(
kmer
))
# récupérer l'adresse
adresse
=
None
# si le tableau principal est déjà rempli à l'adresse:
if
adresse
:
# mettre le kmer dans collision()
collision
.
add
(
h
)
#sinon, écrire le hash à l'adresse dans le tableau principal
else
:
tableau_principal
[
adresse
]
=
h
tableaux
.
append
(
tableau_principal
)
# expliquer
set_kmer_courant
=
collision
.
copy
()
# expliquer
collision
=
set
()
# expliquer
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