From d5e525305df9cd021abbe46eae9ed94878244edf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=97=E6=AA=8E?= <apple@apples-MacBook-Pro.local>
Date: Thu, 2 Mar 2017 23:20:37 +0800
Subject: [PATCH] Lower case text, some epub have uppercased which is beyond
 iso639 standard.

---
 cps/epub.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cps/epub.py b/cps/epub.py
index 2393c256..6e42add9 100644
--- a/cps/epub.py
+++ b/cps/epub.py
@@ -51,6 +51,7 @@ def get_epub_info(tmp_file_path, original_file_name, original_file_extension):
     try:#maybe dc:language isn't present, less possible but possible
         lang = p.xpath('dc:language/text()', namespaces=ns)[0]
         lang = lang.split('-', 1)[0]
+        lang.lower()
         if len(lang) == 2:
             epub_metadata['languages'] = isoLanguages.get(part1=lang).name
         elif len(lang) == 3: