Upgraded XLS abstraction layer.

tablib/formats/_xls.py

@@ -18,12 +18,37 @@ def export_set(dataset):
 	wb = xlwt.Workbook(encoding='utf8')
 	ws = wb.add_sheet(dataset.title if dataset.title else 'Tabbed Dataset')
 
-	_package = dataset._package(dicts=False)
+	dset_sheet(dataset, ws)
 	
+	stream = cStringIO.StringIO()
+	wb.save(stream)
+	return stream.getvalue()
+
+
+def export_book(databook):
+	"""Returns XLS representation of DataBook."""
+
+	wb = xlwt.Workbook(encoding='utf8')
+
+	for i, dset in enumerate(databook._datasets):
+		ws = wb.add_sheet(dset.title if dset.title else 'Sheet%s' % (i))
+
+		dset_sheet(dataset, ws)
+
+
+	stream = cStringIO.StringIO()
+	wb.save(stream)
+	return stream.getvalue()
+
+
+def dset_sheet(dataset, ws):
+	"""Completes given worksheet from given Dataset."""
+	_package = dataset._package(dicts=False)
+
 	for i, sep in enumerate(dataset._separators):
 		_offset = i
 		_package.insert((sep[0] + _offset), (sep[1],))
-	
+
 	for i, row in enumerate(_package):
 		for j, col in enumerate(row):
 
@@ -39,25 +64,4 @@ def export_set(dataset):
 			else:
 				ws.write(i, j, col, wrap)
 
-	stream = cStringIO.StringIO()
-	wb.save(stream)
-	return stream.getvalue()
-
-
-def export_book(databook):
-	"""Returns XLS representation of DataBook."""
-
-	wb = xlwt.Workbook(encoding='utf8')
-
-	for i, dset in enumerate(databook._datasets):
-		ws = wb.add_sheet(dset.title if dset.title else 'Sheet%s' % (i))
-
-		#for row in self._package(dicts=False):
-		for i, row in enumerate(dset._package(dicts=False)):
-			for j, col in enumerate(row):
-				ws.write(i, j, col, wrap)
-
-
-	stream = cStringIO.StringIO()
-	wb.save(stream)
-	return stream.getvalue()
+