Merge pull request #77 from lelit/master

Fix #76: support Python 3, returning a bytes value instead of a str one

tests/test_biff_records.py

@@ -1,12 +1,24 @@
 # coding:utf-8
 
+from io import BytesIO
 import unittest
 
-from xlwt import BIFFRecords
+import xlwt
 
 class TestSharedStringTable(unittest.TestCase):
     def test_shared_string_table(self):
         expected_result = b'\xfc\x00\x11\x00\x01\x00\x00\x00\x01\x00\x00\x00\x03\x00\x01\x1e\x04;\x04O\x04'
-        string_record = BIFFRecords.SharedStringTable(encoding='cp1251')
+        string_record = xlwt.BIFFRecords.SharedStringTable(encoding='cp1251')
         string_record.add_str(u'Оля')
         self.assertEqual(expected_result, string_record.get_biff_record())
+
+class TestIntersheetsRef(unittest.TestCase):
+    def test_intersheets_ref(self):
+        book = xlwt.Workbook()
+        sheet_a = book.add_sheet('A')
+        sheet_a.write(0, 0, 'A1')
+        sheet_a.write(0, 1, 'A2')
+        sheet_b = book.add_sheet('B')
+        sheet_b.write(0, 0, xlwt.Formula("'A'!$A$1&'A'!$A$2"))
+        out = BytesIO()
+        book.save(out)

xlwt/BIFFRecords.py

@@ -2383,7 +2383,7 @@ def get(self):
                 header = pack("<HHH", self._REC_ID, 6 * krefs + 2, nrefs)
             res.append(header)
             res.extend([pack("<HHH", *r) for r in chunk])
-        return ''.join(res)
+        return b''.join(res)
 
 class SupBookRecord(BiffRecord):
     """