[DEVX-5006] Increase constraints for language argument regex.

jmctwilio · jmctwilio · commit efa6385a70fa · 2017-06-16T11:18:46.000-07:00
diff --git a/twilio/twiml/__init__.py b/twilio/twiml/__init__.py
@@ -19,7 +19,7 @@ def format_language(language):
     if not language:
         return language
 
-    if not re.match('^\w\w[_-]\w\w$', language):
+    if not re.match('^[a-zA-Z]{2}[_-][a-zA-Z]{2}$', language):
         raise TwiMLException('Invalid value for language parameter.')
 
     return language[0:2].lower() + '-' + language[3:5].upper()
