encodestring -> encodebytes

account_ebics/models/ebics_userid.py

@@ -350,7 +350,7 @@ class EbicsUserID(models.Model):
         with open(full_tmp_fn, 'rb') as f:
             letter = f.read()
             self.write({
-                'ebics_ini_letter': base64.encodestring(letter),
+                'ebics_ini_letter': base64.encodebytes(letter),
                 'ebics_ini_letter_fn': fn,
             })
 

account_ebics/wizards/ebics_xfer.py

@@ -488,7 +488,7 @@ class EbicsXfer(models.TransientModel):
                 "\nPlease check this file and rename in case there is "
                 "no risk on duplicate transactions.")
                 % fn)
-        data = base64.encodestring(data)
+        data = base64.encodebytes(data)
         ef_vals = {
             'name': fn,
             'data': data,