--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SMART/Java/Python/structure/TranscriptListIterator.py	Fri Jan 18 04:54:14 2013 -0500
@@ -0,0 +1,58 @@
+#
+# Copyright INRA-URGI 2009-2010
+# 
+# This software is governed by the CeCILL license under French law and
+# abiding by the rules of distribution of free software. You can use,
+# modify and/ or redistribute the software under the terms of the CeCILL
+# license as circulated by CEA, CNRS and INRIA at the following URL
+# "http://www.cecill.info".
+# 
+# As a counterpart to the access to the source code and rights to copy,
+# modify and redistribute granted by the license, users are provided only
+# with a limited warranty and the software's author, the holder of the
+# economic rights, and the successive licensors have only limited
+# liability.
+# 
+# In this respect, the user's attention is drawn to the risks associated
+# with loading, using, modifying and/or developing or reproducing the
+# software by the user in light of its specific status of free software,
+# that may mean that it is complicated to manipulate, and that also
+# therefore means that it is reserved for developers and experienced
+# professionals having in-depth computer knowledge. Users are therefore
+# encouraged to load and test the software's suitability as regards their
+# requirements in conditions enabling the security of their systems and/or
+# data to be ensured and, more generally, to use and operate it in the
+# same conditions as regards security.
+# 
+# The fact that you are presently reading this means that you have had
+# knowledge of the CeCILL license and that you accept its terms.
+#
+
+class TranscriptListIterator(object):
+    """A class that iterates on a list of transcript"""
+
+    def __init__(self, transcriptList, verbosity = 0):
+        self.transcriptList = transcriptList
+        self.verbosity = verbosity
+        self.chromosomes = self.transcriptList.transcripts.keys()
+        self.currentChromosome = 0
+        self.currentTranscript = -1
+
+
+    def __iter__(self):
+        return self
+    
+    
+    def next(self):
+        self.currentTranscript += 1
+        while True:
+            if self.currentChromosome >= len(self.transcriptList.transcripts):
+                raise StopIteration
+            elif self.currentTranscript >= len(self.transcriptList.transcripts[self.chromosomes[self.currentChromosome]]):
+                self.currentTranscript = 0
+                self.currentChromosome += 1
+            elif self.transcriptList.transcripts[self.chromosomes[self.currentChromosome]][self.currentTranscript] == None:
+                self.currentTranscript += 1
+            else:
+                return self.transcriptList.transcripts[self.chromosomes[self.currentChromosome]][self.currentTranscript]
+