--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utils/__init__.py	Tue May 31 05:41:03 2016 -0400
@@ -0,0 +1,42 @@
+"""Util functions."""
+
+import pandas as pd
+import cPickle
+
+__author__ = "Gianluca Corrado"
+__copyright__ = "Copyright 2016, Gianluca Corrado"
+__license__ = "MIT"
+__maintainer__ = "Gianluca Corrado"
+__email__ = "gianluca.corrado@unitn.it"
+__status__ = "Production"
+
+
+def feature_size(store_name):
+    """Number of features."""
+    store = pd.io.pytables.HDFStore(store_name)
+    a = store.features
+    store.close()
+    return a.shape[0]
+
+
+def save_serendipity_dic(y, filename):
+    """Save the dictionary with the serendipity values."""
+    store = pd.io.pytables.HDFStore(y)
+    mat = store.matrix
+    store.close()
+    n = len(mat.columns)
+    ser = 1 - mat.sum(axis=1) / n
+
+    f = open(filename, "w")
+    cPickle.dump(ser.to_dict(), f, protocol=2)
+    f.close()
+
+
+def get_serendipity_val(dic, key):
+    """Return the serendipity of a RNA."""
+    # The key was in the training set
+    try:
+        return dic[key]
+    # The key wasn't in the training set, then the serendipity is 1
+    except KeyError:
+        return 1.