def load_data(data_directory):
directories = [d for d in os.listdir(data_directory)
               if os.path.isdir(os.path.join(data_directory, d))]
labels = []
images = []
for d in directories:
    label_directory = os.path.join(data_directory, d)
    file_names = [os.path.join(label_directory, f)
                  for f in os.listdir(label_directory)
                  if f.endswith(".ppm")]
    for f in file_names:
        images.append(skimage.data.imread(f))
        labels.append(int(d))
return images, labels

import os
import skimage
from skimage import transform
from skimage.color import rgb2gray
import numpy as np
import keras
from keras import layers
from keras.layers import Dense
ROOT_PATH = "C://Users//Jay//AppData//Local//Programs//Python//Python37//Scriptcodes//BelgianSignals"
train_data_directory = os.path.join(ROOT_PATH, "Training")
test_data_directory = os.path.join(ROOT_PATH, "Testing")

images, labels = load_data(train_data_directory)


# Print the `labels` dimensions
print(np.array(labels))

# Print the number of `labels`'s elements
print(np.array(labels).size)

# Count the number of labels
print(len(set(np.array(labels))))

# Print the `images` dimensions
print(np.array(images))

# Print the number of `images`'s elements
print(np.array(images).size)

# Print the first instance of `images`
np.array(images)[0]

images28 = [transform.resize(image, (28, 28)) for image in images]

images28 = np.array(images28)

images28 = rgb2gray(images28)

# Import `tensorflow`
import tensorflow as tf

# Initialize placeholders
x = tf.placeholder(dtype = tf.float32, shape = [None, 28, 28])
y = tf.placeholder(dtype = tf.int32, shape = [None])

# Flatten the input data
images_flat = tf.keras.layers.flatten(x)

# Fully connected layer
logits = tf.contrib.layers.dense(images_flat, 62, tf.nn.relu)

# Define a loss function
loss = tf.reduce_mean(tf.nn.sparse_softmax_cross_entropy_with_logits(labels = y,
                                                                    logits = logits))
# Define an optimizer
train_op = tf.train.AdamOptimizer(learning_rate=0.001).minimize(loss)

# Convert logits to label indexes
correct_pred = tf.argmax(logits, 1)

# Define an accuracy metric
accuracy = tf.reduce_mean(tf.cast(correct_pred, tf.float32))