From 757bb75dd0d83b0618f4f58a5e4e76414291ed79 Mon Sep 17 00:00:00 2001
From: Sergio Oliveira <sergio@tracy.com.br>
Date: Thu, 28 Feb 2013 14:32:36 -0300
Subject: [PATCH] Only skiping if string contaings numbers only

---
 pynfe/utils/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pynfe/utils/__init__.py b/pynfe/utils/__init__.py
index b257ccc..ac62812 100644
--- a/pynfe/utils/__init__.py
+++ b/pynfe/utils/__init__.py
@@ -146,7 +146,7 @@ def safe_str(str_):
 
 
 def obter_uf_por_codigo(codigo_uf):
-    if isinstance(codigo_uf, basestring):
+    if isinstance(codigo_uf, basestring) and codigo_uf.isalpha():
         return codigo_uf
 
     estados = {v: k for k, v in flags.CODIGOS_ESTADOS.items()}