Use io.BytesIO and io.StringIO

In python3 StringIO and cStringIO are gone. In their place are
io.BytesIO and io.StringIO. They are somewhat different in that they are
not separated on implementation, but on the type they emulated. BytesIO
works like the bytes class (str in python 2), while StringIO works like
the str class (unicode in python2).

1 files changed, 2 insertions, 2 deletions

diff --git a/alot/commands/thread.py b/alot/commands/thread.py
index d73ef622..02017ae9 100644
--- a/alot/commands/thread.py
+++ b/alot/commands/thread.py
@@ -14,7 +14,7 @@ from email.utils import getaddresses, parseaddr, formataddr
 from email.message import Message
 
 from twisted.internet.defer import inlineCallbacks
-from cStringIO import StringIO
+from io import BytesIO
 
 from . import Command, registerCommand
 from .globals import ExternalCommand
@@ -970,7 +970,7 @@ class OpenAttachmentCommand(Command):
                 def afterwards():
                     os.unlink(tempfile_name)
             else:
-                handler_stdin = StringIO()
+                handler_stdin = BytesIO()
                 self.attachment.write(handler_stdin)
 
             # create handler command list