From 7ea776dff4cc88ff7de0752136a452dd44dca995 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20Kut=C3=BD?= <6du1ro.n@gmail.com>
Date: Tue, 10 Apr 2018 08:20:47 +0200
Subject: [PATCH] Fix bad metrics format for short metrics. (#13778)

---
 homeassistant/components/prometheus.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/homeassistant/components/prometheus.py b/homeassistant/components/prometheus.py
index f9629ca726a..dc1cbd945a7 100644
--- a/homeassistant/components/prometheus.py
+++ b/homeassistant/components/prometheus.py
@@ -185,6 +185,9 @@ class Metrics(object):
         unit = state.attributes.get(ATTR_UNIT_OF_MEASUREMENT)
         metric = state.entity_id.split(".")[1]
 
+        if '_' not in str(metric):
+            metric = state.entity_id.replace('.', '_')
+
         try:
             int(metric.split("_")[-1])
             metric = "_".join(metric.split("_")[:-1])