Intelegentny_Pszczelarz/.venv/Lib/site-packages/keras/datasets/fashion_mnist.py
2023-06-19 00:49:18 +02:00

112 lines
3.5 KiB
Python

# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Fashion-MNIST dataset."""
import gzip
import os
import numpy as np
from keras.utils.data_utils import get_file
# isort: off
from tensorflow.python.util.tf_export import keras_export
@keras_export("keras.datasets.fashion_mnist.load_data")
def load_data():
"""Loads the Fashion-MNIST dataset.
This is a dataset of 60,000 28x28 grayscale images of 10 fashion categories,
along with a test set of 10,000 images. This dataset can be used as
a drop-in replacement for MNIST.
The classes are:
| Label | Description |
|:-----:|-------------|
| 0 | T-shirt/top |
| 1 | Trouser |
| 2 | Pullover |
| 3 | Dress |
| 4 | Coat |
| 5 | Sandal |
| 6 | Shirt |
| 7 | Sneaker |
| 8 | Bag |
| 9 | Ankle boot |
Returns:
Tuple of NumPy arrays: `(x_train, y_train), (x_test, y_test)`.
**x_train**: uint8 NumPy array of grayscale image data with shapes
`(60000, 28, 28)`, containing the training data.
**y_train**: uint8 NumPy array of labels (integers in range 0-9)
with shape `(60000,)` for the training data.
**x_test**: uint8 NumPy array of grayscale image data with shapes
(10000, 28, 28), containing the test data.
**y_test**: uint8 NumPy array of labels (integers in range 0-9)
with shape `(10000,)` for the test data.
Example:
```python
(x_train, y_train), (x_test, y_test) = fashion_mnist.load_data()
assert x_train.shape == (60000, 28, 28)
assert x_test.shape == (10000, 28, 28)
assert y_train.shape == (60000,)
assert y_test.shape == (10000,)
```
License:
The copyright for Fashion-MNIST is held by Zalando SE.
Fashion-MNIST is licensed under the [MIT license](
https://github.com/zalandoresearch/fashion-mnist/blob/master/LICENSE).
"""
dirname = os.path.join("datasets", "fashion-mnist")
base = "https://storage.googleapis.com/tensorflow/tf-keras-datasets/"
files = [
"train-labels-idx1-ubyte.gz",
"train-images-idx3-ubyte.gz",
"t10k-labels-idx1-ubyte.gz",
"t10k-images-idx3-ubyte.gz",
]
paths = []
for fname in files:
paths.append(get_file(fname, origin=base + fname, cache_subdir=dirname))
with gzip.open(paths[0], "rb") as lbpath:
y_train = np.frombuffer(lbpath.read(), np.uint8, offset=8)
with gzip.open(paths[1], "rb") as imgpath:
x_train = np.frombuffer(imgpath.read(), np.uint8, offset=16).reshape(
len(y_train), 28, 28
)
with gzip.open(paths[2], "rb") as lbpath:
y_test = np.frombuffer(lbpath.read(), np.uint8, offset=8)
with gzip.open(paths[3], "rb") as imgpath:
x_test = np.frombuffer(imgpath.read(), np.uint8, offset=16).reshape(
len(y_test), 28, 28
)
return (x_train, y_train), (x_test, y_test)