neural network: Why is my code not reproducible?

问题

I thought my neural network would be reproducible, but it is not! The results are not dramatically different but for example the loss is about 0.1 different from one run. So here is my Code!

# Code reproduzierbar machen
from numpy.random import seed
seed(0)
from tensorflow import set_random_seed
set_random_seed(0)

# Importiere Datasets (Training und Test)
import pandas as pd
poker_train = pd.read_csv("C:/Users/elihe/Documents/Studium Master/WS 19 und 20/Softwareprojekt/poker-hand-training-true.data")
poker_test = pd.read_csv("C:/Users/elihe/Documents/Studium Master/WS 19 und 20/Softwareprojekt/poker-hand-testing.data")

from sklearn.preprocessing import OneHotEncoder

# Trainings- und Testset in Input und Output verwandeln
X_tr = poker_train.iloc[:, 0:10].values
y_tr = poker_train.iloc[:, 10:11].values

X_te = poker_test.iloc[:, 0:10].values
y_te = poker_test.iloc[:, 10:11].values

# Output in 0-1-Vektoren verwandeln
encode = OneHotEncoder(categories = 'auto')
y_train = encode.fit_transform(y_tr).toarray()
y_test = encode.fit_transform(y_te).toarray()

from sklearn.preprocessing import StandardScaler
sc = StandardScaler()

X_train = sc.fit_transform(X_tr)
X_test = sc.transform(X_te)

# NN mit Keras erstellen
import keras
from keras.models import Sequential
from keras.layers import Dense

nen.add(Dense(400, input_dim = 10, activation = 'sigmoid'))
nen.add(Dense(400, activation = 'sigmoid'))
nen.add(Dense(10, activation = 'softmax'))

from keras.optimizers import RMSprop
nen.compile(loss='binary_crossentropy', optimizer=RMSprop(0.001), metrics=['accuracy'])

nen_fit = nen.fit(X_train, y_train,epochs=30, batch_size=15, verbose=1, validation_split = 0.2, shuffle = False)

I thought i make it reproducible with the first few lines...can someone help? I googled a lot but nothing helped. Is it just normal that there is a little difference? I would like to make it exactely (!) reproducible.

Btw please ignore my comments in the code..i am german :) and you have to know that i am new in neural networks!

回答1:

I suggest you this

import numpy as np
import random as rn
import tensorflow as tf
import keras
from keras import backend as K

#-----------------------------Keras reproducible------------------#
SEED = 1234

tf.set_random_seed(SEED)
os.environ['PYTHONHASHSEED'] = str(SEED)
np.random.seed(SEED)
rn.seed(SEED)

session_conf = tf.ConfigProto(
    intra_op_parallelism_threads=1, 
    inter_op_parallelism_threads=1
)
sess = tf.Session(
    graph=tf.get_default_graph(), 
    config=session_conf
)
K.set_session(sess)

回答2:

I use a version of Outcast's answer here: Why can't I get reproducible results in Keras even though I set the random seeds?

    import os
    import random
    import numpy as np
    seed_value = 1
    # 1. Set `PYTHONHASHSEED` environment variable at a fixed value
    os.environ['PYTHONHASHSEED'] = str(seed_value)
    # 2. Set `python` built-in pseudo-random generator at a fixed value
    random.seed(seed_value)
    # 3. Set `numpy` pseudo-random generator at a fixed value
    np.random.seed(seed_value)

If that does not work, try setting scikitlearn global seed: https://github.com/scikit-learn/scikit-learn/issues/10237

来源：https://stackoverflow.com/questions/61559333/neural-network-why-is-my-code-not-reproducible

标签

python

tensorflow

keras

neural-network