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, 4 insertions, 4 deletions

diff --git a/alot/helper.py b/alot/helper.py
index effec6b3..ce307875 100644
--- a/alot/helper.py
+++ b/alot/helper.py
@@ -9,7 +9,7 @@ from __future__ import division
 from datetime import timedelta
 from datetime import datetime
 from collections import deque
-from cStringIO import StringIO
+from io import BytesIO
 import logging
 import mimetypes
 import os
@@ -315,8 +315,8 @@ def call_cmd_async(cmdlist, stdin=None, env=None):
     class _EverythingGetter(ProcessProtocol):
         def __init__(self, deferred):
             self.deferred = deferred
-            self.outBuf = StringIO()
-            self.errBuf = StringIO()
+            self.outBuf = BytesIO()
+            self.errBuf = BytesIO()
             self.outReceived = self.outBuf.write
             self.errReceived = self.errBuf.write
 
@@ -606,7 +606,7 @@ def email_as_string(mail):
     :param mail: email to convert to string
     :rtype: str
     """
-    fp = StringIO()
+    fp = BytesIO()
     g = Generator(fp, mangle_from_=False, maxheaderlen=78)
     g.flatten(mail)
     as_string = RFC3156_canonicalize(fp.getvalue())