fix data import test case

frappe/utils/csvutils.py

@@ -105,7 +105,8 @@ class UnicodeWriter:
 		self.writer = csv.writer(self.queue, quoting=csv.QUOTE_NONNUMERIC)
 
 	def writerow(self, row):
-		row = encode(row, self.encoding)
+		if six.PY2:
+			row = encode(row, self.encoding)
 		self.writer.writerow(row)
 
 	def getvalue(self):