From 872df6777675c4edba5171948b6b72f783c4acc4 Mon Sep 17 00:00:00 2001
From: Dominik Roth <dominik.roth.dev@gmail.com>
Date: Sat, 30 Oct 2021 14:19:50 +0200
Subject: [PATCH] Changed cache workings to allow better controll when used as
 lib

---
 meuro.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/meuro.py b/meuro.py
index bf582b1..c870b04 100755
--- a/meuro.py
+++ b/meuro.py
@@ -8,14 +8,16 @@ from dateutil.parser._parser import ParserError as DateParserError
 _years = None
 
 def _loadYearsTable(maxCacheSeconds=3600):
+    global _years
     if os.path.isfile('cache.json'):
         with open('cache.json', 'r') as f:
             cacheUpdate, cacheYears = json.loads(f.read())
         if (datetime.now() - dparser.isoparse(cacheUpdate)).total_seconds() < maxCacheSeconds:
             # JSON does not allow integers as keys; so we convert them back here...
             cacheYears = {int(y):{int(m):float(n) for m,n in ms.items()} for y,ms in cacheYears.items()}
-            return cacheYears
-    return _loadYearsTableWeb()
+            _years = cacheYears
+            return
+    _years = _loadYearsTableWeb()
 
 def _loadYearsTableWeb():
     print('[i] Fetching new data from ECB-Servers...')
@@ -47,7 +49,7 @@ def _loadYearsTableWeb():
 def exchangeRate(date=None):
     global _years
     if _years==None:
-        _years = _loadYearsTable()
+        _loadYearsTable()
     if date==None:
         date = datetime.now()
     month, year = date.month, date.year