# HG changeset patch
# User bergstra@mlp4.ais.sandbox
# Date 1234334578 18000
# Node ID d3d8f5a17909b5dfb7698d50e09ad6c2906bc8c7
# Parent  37a259d6946a4b7afbe63f010563f7fd8951b2c0
print warning on undefined PYLEARN_DATA_ROOT

diff -r 37a259d6946a -r d3d8f5a17909 pylearn/datasets/MNIST.py
--- a/pylearn/datasets/MNIST.py	Wed Feb 11 01:42:26 2009 -0500
+++ b/pylearn/datasets/MNIST.py	Wed Feb 11 01:42:58 2009 -0500
@@ -7,7 +7,7 @@
 import numpy
 
 from ..io.amat import AMat
-from .config import data_root
+from .config import data_root # config
 from .dataset import Dataset
 
 def head(n=10, path=None):
diff -r 37a259d6946a -r d3d8f5a17909 pylearn/datasets/config.py
--- a/pylearn/datasets/config.py	Wed Feb 11 01:42:26 2009 -0500
+++ b/pylearn/datasets/config.py	Wed Feb 11 01:42:58 2009 -0500
@@ -4,10 +4,13 @@
 Especially, the locations of data files.
 """
 
-import os
+import os, sys
 def env_get(key, default):
+    if os.getenv(key) is None:
+        print >> sys.stderr, "WARNING: Environment variable", key,
+        print >> sys.stderr, "is not set. Using default of", default
     return default if os.getenv(key) is None else os.getenv(key)
 
 def data_root():
-    return env_get('PYLEARN_DATA_ROOT', '/u/bergstrj/pub/data/')
+    return env_get('PYLEARN_DATA_ROOT', os.getenv('HOME')+'/data')