Add missing str import.

matrix/api.py

@@ -15,6 +15,7 @@
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 from __future__ import unicode_literals
+from builtins import str
 
 import time
 import json

matrix/bar_items.py

@@ -15,6 +15,7 @@
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 from __future__ import unicode_literals
+from builtins import str
 
 from matrix.utf import utf8_decode
 from matrix.utils import key_from_value

matrix/commands.py

@@ -15,6 +15,7 @@
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 from __future__ import unicode_literals
+from builtins import str
 
 import re
 import time

matrix/http.py

@@ -15,6 +15,7 @@
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 from __future__ import unicode_literals
+from builtins import str
 
 import json
 from enum import Enum, unique

matrix/messages.py

@@ -15,6 +15,7 @@
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 from __future__ import unicode_literals
+from builtins import str
 
 import time
 import json

matrix/server.py

@@ -16,6 +16,7 @@
 
 
 from __future__ import unicode_literals
+from builtins import str
 
 import ssl