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				@@ -296,7 +296,7 @@ class LoggedIO(object): 
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				     def _segment_names(self, reverse=False): 
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				         for dirpath, dirs, filenames in os.walk(os.path.join(self.path, 'data')): 
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				             dirs.sort(key=int, reverse=reverse) 
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				-            filenames.sort(key=int, reverse=reverse) 
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				+            filenames = sorted((filename for filename in filenames if filename.isdigit()), key=int, reverse=reverse) 
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				             for filename in filenames: 
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				                 yield int(filename), os.path.join(dirpath, filename) 
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