diff test-data/tf-script.py @ 0:f4619200cb0a draft

"planemo upload for repository https://github.com/bgruening/galaxytools/tree/master/tools/jupyter_job commit f945b1bff5008ba01da31c7de64e5326579394d6"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-data/tf-script.py	Sat Dec 11 17:56:38 2021 +0000
@@ -0,0 +1,31 @@
+import numpy as np
+import tensorflow as tf
+
+(mnist_images, mnist_labels), _ = tf.keras.datasets.mnist.load_data()
+mnist_images, mnist_labels = mnist_images[:128], mnist_labels[:128]
+dataset = tf.data.Dataset.from_tensor_slices((tf.cast(mnist_images[..., tf.newaxis] / 255, tf.float32), tf.cast(mnist_labels, tf.int64)))
+dataset = dataset.shuffle(1000).batch(32)
+
+tot_loss = []
+epochs = 1
+
+mnist_model = tf.keras.Sequential([
+    tf.keras.layers.Conv2D(16, [3, 3], activation='relu'),
+    tf.keras.layers.Conv2D(16, [3, 3], activation='relu'),
+    tf.keras.layers.GlobalAveragePooling2D(),
+    tf.keras.layers.Dense(10)
+])
+
+optimizer = tf.keras.optimizers.Adam()
+loss_object = tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True)
+
+for epoch in range(epochs):
+    loss_history = []
+    for (batch, (images, labels)) in enumerate(dataset):
+        with tf.GradientTape() as tape:
+            logits = mnist_model(images, training=True)
+            loss_value = loss_object(labels, logits)
+        loss_history.append(loss_value.numpy().mean())
+        grads = tape.gradient(loss_value, mnist_model.trainable_variables)
+        optimizer.apply_gradients(zip(grads, mnist_model.trainable_variables))
+    tot_loss.append(np.mean(loss_history))