change: git support testing (#861)

* add example files for git support testing

Author: GaryTu1020

.codecov.yml

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+# python-sdk-testing
+It's a repo for testing the sagemaker Python SDK Git support

.coveragerc

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+# this is supposed to be a dependency.

.flake8

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+This is a file.

.gitignore

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+This is a file.

.pylintrc

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+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file 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.
+from __future__ import absolute_import
+
+import argparse
+import gzip
+import json
+import logging
+import os
+import struct
+import bar 
+
+import mxnet as mx
+import numpy as np
+
+
+def load_data(path):
+    with gzip.open(find_file(path, "labels.gz")) as flbl:
+        struct.unpack(">II", flbl.read(8))
+        labels = np.fromstring(flbl.read(), dtype=np.int8)
+    with gzip.open(find_file(path, "images.gz")) as fimg:
+        _, _, rows, cols = struct.unpack(">IIII", fimg.read(16))
+        images = np.fromstring(fimg.read(), dtype=np.uint8).reshape(len(labels), rows, cols)
+        images = images.reshape(images.shape[0], 1, 28, 28).astype(np.float32) / 255
+    return labels, images
+
+
+def find_file(root_path, file_name):
+    for root, dirs, files in os.walk(root_path):
+        if file_name in files:
+            return os.path.join(root, file_name)
+
+
+def build_graph():
+    data = mx.sym.var('data')
+    data = mx.sym.flatten(data=data)
+    fc1 = mx.sym.FullyConnected(data=data, num_hidden=128)
+    act1 = mx.sym.Activation(data=fc1, act_type="relu")
+    fc2 = mx.sym.FullyConnected(data=act1, num_hidden=64)
+    act2 = mx.sym.Activation(data=fc2, act_type="relu")
+    fc3 = mx.sym.FullyConnected(data=act2, num_hidden=10)
+    return mx.sym.SoftmaxOutput(data=fc3, name='softmax')
+
+
+def get_train_context(num_gpus):
+    if num_gpus:
+        return [mx.gpu(i) for i in range(num_gpus)]
+    else:
+        return mx.cpu()
+
+
+def train(batch_size, epochs, learning_rate, num_gpus, training_channel, testing_channel,
+          hosts, current_host, model_dir):
+    (train_labels, train_images) = load_data(training_channel)
+    (test_labels, test_images) = load_data(testing_channel)
+
+    # Data parallel training - shard the data so each host
+    # only trains on a subset of the total data.
+    shard_size = len(train_images) // len(hosts)
+    for i, host in enumerate(hosts):
+        if host == current_host:
+            start = shard_size * i
+            end = start + shard_size
+            break
+
+    train_iter = mx.io.NDArrayIter(train_images[start:end], train_labels[start:end], batch_size,
+                                   shuffle=True)
+    val_iter = mx.io.NDArrayIter(test_images, test_labels, batch_size)
+
+    logging.getLogger().setLevel(logging.DEBUG)
+
+    kvstore = 'local' if len(hosts) == 1 else 'dist_sync'
+
+    mlp_model = mx.mod.Module(symbol=build_graph(),
+                              context=get_train_context(num_gpus))
+    mlp_model.fit(train_iter,
+                  eval_data=val_iter,
+                  kvstore=kvstore,
+                  optimizer='sgd',
+                  optimizer_params={'learning_rate': learning_rate},
+                  eval_metric='acc',
+                  batch_end_callback=mx.callback.Speedometer(batch_size, 100),
+                  num_epoch=epochs)
+
+    if len(hosts) == 1 or current_host == hosts[0]:
+        save(model_dir, mlp_model)
+
+
+def save(model_dir, model):
+    model.symbol.save(os.path.join(model_dir, 'model-symbol.json'))
+    model.save_params(os.path.join(model_dir, 'model-0000.params'))
+
+    signature = [{'name': data_desc.name, 'shape': [dim for dim in data_desc.shape]}
+                 for data_desc in model.data_shapes]
+    with open(os.path.join(model_dir, 'model-shapes.json'), 'w') as f:
+        json.dump(signature, f)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument('--batch-size', type=int, default=100)
+    parser.add_argument('--epochs', type=int, default=10)
+    parser.add_argument('--learning-rate', type=float, default=0.1)
+
+    parser.add_argument('--model-dir', type=str, default=os.environ['SM_MODEL_DIR'])
+    parser.add_argument('--train', type=str, default=os.environ['SM_CHANNEL_TRAIN'])
+    parser.add_argument('--test', type=str, default=os.environ['SM_CHANNEL_TEST'])
+
+    parser.add_argument('--current-host', type=str, default=os.environ['SM_CURRENT_HOST'])
+    parser.add_argument('--hosts', type=list, default=json.loads(os.environ['SM_HOSTS']))
+
+    args = parser.parse_args()
+
+    num_gpus = int(os.environ['SM_NUM_GPUS'])
+
+    train(args.batch_size, args.epochs, args.learning_rate, num_gpus, args.train, args.test,
+          args.hosts, args.current_host, args.model_dir)

.readthedocs.yml

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+This is a file.