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-rw-r--r--python/vyos/template.py15
1 files changed, 15 insertions, 0 deletions
diff --git a/python/vyos/template.py b/python/vyos/template.py
index 7810f5edd..3fbb33acb 100644
--- a/python/vyos/template.py
+++ b/python/vyos/template.py
@@ -346,3 +346,18 @@ def get_dhcp_router(interface):
if 'option routers' in line:
(_, _, address) = line.split()
return address.rstrip(';')
+
+@register_filter('natural_sort')
+def natural_sort(iterable):
+ import re
+ from jinja2.runtime import Undefined
+
+ if isinstance(iterable, Undefined) or iterable is None:
+ return list()
+
+ def convert(text):
+ return int(text) if text.isdigit() else text.lower()
+ def alphanum_key(key):
+ return [convert(c) for c in re.split('([0-9]+)', str(key))]
+
+ return sorted(iterable, key=alphanum_key)