Conditional Random Fields

@@ -148,6 +148,27 @@ def word2features(sent, i):
     '''
     return features
 
+def sent2features(sent):
+    return [word2features(sent, i) for i in range(len(sent))]
+
+
+def sent2labels(sent):
+    return [elem.split('|')[3] for elem in sent]
+
+
+def sent2tokens(sent):
+    return [token for token, postag, label in sent]
+
+
+def print_transitions(trans_features, f):
+    for (label_from, label_to), weight in trans_features:
+        f.write("{:6} -> {:7} {:0.6f}\n".format(label_from, label_to, weight))
+
+
+def print_state_features(state_features, f):
+    for (attr, label), weight in state_features:
+        f.write("{:0.6f} {:8} {}\n".format(weight, label, attr.encode("utf-8")))
+
 __author__ = 'CMendezC'
 
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