From 9b09e9b65d1cba0ea4be5bb7ae4af7f3ac7bbbfd Mon Sep 17 00:00:00 2001
From: Carton He <cartonhe@gmail.com>
Date: Sun, 6 Dec 2020 23:25:05 +0800
Subject: [PATCH] fix ValueError when converting empty string KM to float in
 sgf parser

Some sgfs has "KM" property with empty value, this could cause
ValueError exception.
---
 katrain/core/sgf_parser.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/katrain/core/sgf_parser.py b/katrain/core/sgf_parser.py
index 7f284a4..5b03656 100644
--- a/katrain/core/sgf_parser.py
+++ b/katrain/core/sgf_parser.py
@@ -192,7 +192,12 @@ class SGFNode:
     @property
     def komi(self) -> float:
         """Retrieves the root's KM property, or 6.5 if missing"""
-        return float(self.root.get_property("KM", 6.5))
+        try:
+            km = float(self.root.get_property("KM", 6.5))
+        except ValueError:
+            km = 6.5
+
+        return km
 
     @property
     def ruleset(self) -> str: