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00_train.py
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00_train.py
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########################################################################
# import default libraries
########################################################################
import os
import sys
import gc
########################################################################
########################################################################
# import additional libraries
########################################################################
import numpy as np
import scipy.stats
# from import
from tqdm import tqdm
try:
from sklearn.externals import joblib
except:
import joblib
# original lib
import common as com
import keras_model
########################################################################
########################################################################
# load parameter.yaml
########################################################################
param = com.yaml_load()
########################################################################
########################################################################
# visualizer
########################################################################
class visualizer(object):
def __init__(self):
import matplotlib.pyplot as plt
self.plt = plt
self.fig = self.plt.figure(figsize=(7, 5))
self.plt.subplots_adjust(wspace=0.3, hspace=0.3)
def loss_plot(self, loss, val_loss):
"""
Plot loss curve.
loss : list [ float ]
training loss time series.
val_loss : list [ float ]
validation loss time series.
return : None
"""
ax = self.fig.add_subplot(1, 1, 1)
ax.cla()
ax.plot(loss)
ax.plot(val_loss)
ax.set_title("Model loss")
ax.set_xlabel("Epoch")
ax.set_ylabel("Loss")
ax.legend(["Train", "Validation"], loc="upper right")
def save_figure(self, name):
"""
Save figure.
name : str
save png file path.
return : None
"""
self.plt.savefig(name)
########################################################################
########################################################################
# get data from the list for file paths
########################################################################
def file_list_to_data(file_list,
msg="calc...",
n_mels=64,
n_frames=5,
n_hop_frames=1,
n_fft=1024,
hop_length=512,
power=2.0):
"""
convert the file_list to a vector array.
file_to_vector_array() is iterated, and the output vector array is concatenated.
file_list : list [ str ]
.wav filename list of dataset
msg : str ( default = "calc..." )
description for tqdm.
this parameter will be input into "desc" param at tqdm.
return : numpy.array( numpy.array( float ) )
data for training (this function is not used for test.)
* dataset.shape = (number of feature vectors, dimensions of feature vectors)
"""
# calculate the number of dimensions
dims = n_mels * n_frames
# iterate file_to_vector_array()
for idx in tqdm(range(len(file_list)), desc=msg):
vectors = com.file_to_vectors(file_list[idx],
n_mels=n_mels,
n_frames=n_frames,
n_fft=n_fft,
hop_length=hop_length,
power=power)
vectors = vectors[: : n_hop_frames, :]
if idx == 0:
data = np.zeros((len(file_list) * vectors.shape[0], dims), float)
data[vectors.shape[0] * idx : vectors.shape[0] * (idx + 1), :] = vectors
return data
########################################################################
########################################################################
# main 00_train.py
########################################################################
if __name__ == "__main__":
# check mode
# "development": mode == True
# "evaluation": mode == False
mode = com.command_line_chk()
if mode is None:
sys.exit(-1)
# make output directory
os.makedirs(param["model_directory"], exist_ok=True)
# initialize the visualizer
visualizer = visualizer()
# load base_directory list
dirs = com.select_dirs(param=param, mode=mode)
# loop of the base directory
for idx, target_dir in enumerate(dirs):
print("\n===========================")
print("[{idx}/{total}] {target_dir}".format(target_dir=target_dir, idx=idx+1, total=len(dirs)))
# set path
machine_type = os.path.split(target_dir)[1]
model_file_path = "{model}/model_{machine_type}.hdf5".format(model=param["model_directory"],
machine_type=machine_type)
if os.path.exists(model_file_path):
com.logger.info("model exists")
continue
history_img = "{model}/history_{machine_type}.png".format(model=param["model_directory"],
machine_type=machine_type)
# pickle file for storing anomaly score distribution
score_distr_file_path = "{model}/score_distr_{machine_type}.pkl".format(model=param["model_directory"],
machine_type=machine_type)
# generate dataset
print("============== DATASET_GENERATOR ==============")
# get file list for all sections
# all values of y_true are zero in training
files, y_true = com.file_list_generator(target_dir=target_dir,
section_name="*",
dir_name="train",
mode=mode)
data = file_list_to_data(files,
msg="generate train_dataset",
n_mels=param["feature"]["n_mels"],
n_frames=param["feature"]["n_frames"],
n_hop_frames=param["feature"]["n_hop_frames"],
n_fft=param["feature"]["n_fft"],
hop_length=param["feature"]["hop_length"],
power=param["feature"]["power"])
# number of vectors for each wave file
n_vectors_ea_file = int(data.shape[0] / len(files))
# train model
print("============== MODEL TRAINING ==============")
model = keras_model.get_model(param["feature"]["n_mels"] * param["feature"]["n_frames"],
param["fit"]["lr"])
model.summary()
history = model.fit(x=data,
y=data,
epochs=param["fit"]["epochs"],
batch_size=param["fit"]["batch_size"],
shuffle=param["fit"]["shuffle"],
validation_split=param["fit"]["validation_split"],
verbose=param["fit"]["verbose"])
# calculate y_pred for fitting anomaly score distribution
y_pred = []
start_idx = 0
for file_idx in range(len(files)):
y_pred.append(np.mean(np.square(data[start_idx : start_idx + n_vectors_ea_file, :]
- model.predict(data[start_idx : start_idx + n_vectors_ea_file, :]))))
start_idx += n_vectors_ea_file
# fit anomaly score distribution
shape_hat, loc_hat, scale_hat = scipy.stats.gamma.fit(y_pred)
gamma_params = [shape_hat, loc_hat, scale_hat]
joblib.dump(gamma_params, score_distr_file_path)
visualizer.loss_plot(history.history["loss"], history.history["val_loss"])
visualizer.save_figure(history_img)
model.save(model_file_path)
com.logger.info("save_model -> {}".format(model_file_path))
print("============== END TRAINING ==============")
del data
del model
keras_model.clear_session()
gc.collect()