More usability notes

coderye · Sep 9, 2016 · 9f749f1 · 9f749f1
1 parent 0101e91
commit 9f749f1
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Showing 2 changed files with 9 additions and 4 deletions.
diff --git a/bindings/python/examples/CifarResNet/CifarResNet.py b/bindings/python/examples/CifarResNet/CifarResNet.py
@@ -19,9 +19,9 @@
 # The minibatch source is configured using a hierarchical dictionary of key:value pairs
 def create_mb_source(features_stream_name, labels_stream_name, image_height, image_width, num_channels, num_classes):
     map_file_rel_path = os.path.join(*"../../../../Examples/Image/Miscellaneous/CIFAR-10/cifar-10-batches-py/train_map.txt".split("/"))
-    map_file = os.path.join(abs_path, map_file_rel_path)
+    map_file = os.path.normpath(os.path.join(abs_path, map_file_rel_path))
     mean_file_rel_path = os.path.join(*"../../../../Examples/Image/Miscellaneous/CIFAR-10/cifar-10-batches-py/CIFAR-10_mean.xml".split("/"))
-    mean_file = os.path.join(abs_path, mean_file_rel_path)
+    mean_file = os.path.normpath(os.path.join(abs_path, mean_file_rel_path))
 
     if not os.path.exists(map_file) or not os.path.exists(mean_file):
         cifar_py3 = "" if sys.version_info.major < 3 else "_py3" 

diff --git a/bindings/python/examples/MNIST/SimpleMNIST.py b/bindings/python/examples/MNIST/SimpleMNIST.py
@@ -32,8 +32,11 @@ def simple_mnist():
     ce = cross_entropy_with_softmax(netout, label)
     pe = classification_error(netout, label)
 
-    rel_path = r"../../../../Examples/Image/MNIST/Data/Train-28x28_cntk_text.txt"
-    path = os.path.join(os.path.dirname(os.path.abspath(__file__)), rel_path)
+    rel_path = os.path.join(*"../../../../Examples/Image/MNIST/Data/Train-28x28_cntk_text.txt".split("/"))
+    path = os.path.normpath(os.path.join(abs_path, rel_path))
+    if not os.path.exists(path):
+        readme_file = os.path.normpath(os.path.join(os.path.dirname(path), "..", "README.md"))
+        raise RuntimeError("File '%s' does not exist. Please follow the instructions at %s to download and prepare it."%(path, readme_file))
     feature_stream_name = 'features'
     labels_stream_name = 'labels'
 
@@ -65,6 +68,8 @@ def simple_mnist():
 if __name__=='__main__':
     # Specify the target device to be used for computing
     target_device = DeviceDescriptor.gpu_device(0)
+    # If it is crashing, probably you don't have a GPU, so try with CPU:
+    # target_device = DeviceDescriptor.cpu_device()
     DeviceDescriptor.set_default_device(target_device)
 
     simple_mnist()