Drop 2to3 build step; make all code compatible with all Pythons

Make all library code compatible with both Python 2 and Python 3. Helps
move to modern Python idioms. Can now write for Python 3 (with
workarounds for Python 2) instead of the other way around.

In the future, when it is eventually time to drop Python 2, the library
will be in a better position to remove workarounds

Added a very small comparability module compat.py where required. It
includes definitions for:

- text_type -- A type. str on Python 3. unicode on Python 2.
- string_types -- A tuple. Contains only str on Python 3. Contains str &
                  unicode on Python 2.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/errorcodes.py b/lib/errorcodes.py
index 24fcf25..b8742f5 100644
--- a/lib/errorcodes.py
+++ b/lib/errorcodes.py
@@ -40,7 +40,7 @@ def lookup(code, _cache={}):
 
     # Generate the lookup map at first usage.
     tmp = {}
-    for k, v in globals().iteritems():
+    for k, v in globals().items():
         if isinstance(v, str) and len(v) in (2, 5):
             tmp[v] = k