debian_support: use BytesIO for GzipFile in python3

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/python/debian_support.py b/lib/python/debian_support.py
index 3a79349cae..a51435caf3 100644
--- a/lib/python/debian_support.py
+++ b/lib/python/debian_support.py
@@ -29,7 +29,11 @@ try:
     from urllib.request import urlopen
 except ImportError:
     from urllib2 import urlopen
-from cStringIO import StringIO
+
+try:
+    from cStringIO import StringIO as streamIO
+except ImportError:
+    from io import BytesIO as streamIO
 
 from helpers import isstring
 
@@ -300,7 +304,7 @@ def downloadGunzipLines(remote):
 
     data = urlopen(remote, timeout=TIMEOUT)
     try:
-        gfile = gzip.GzipFile(fileobj=StringIO(data.read()))
+        gfile = gzip.GzipFile(fileobj=streamIO(data.read()))
         try:
             return gfile.readlines()
         finally: