Move __currency out of Coins class

bot/coins.py

@@ -6,26 +6,23 @@ from irc3.utils import IrcString
 
 from . import Plugin
 
-
+def _currency(name, prefix=None, suffix=None):
+    def tostr(value):
+        return '{prefix}{value:,.2f}{suffix}'.format(
+                prefix=prefix or '',
+                suffix=suffix or ('' if (prefix or suffix) else (' ' + name)),
+                value=value)
+    return tostr
 
 class Coins(Plugin):
     API_URL = 'https://api.cryptowat.ch/markets/{market}/{crypto}{currency}/summary'
 
-    @staticmethod
-    def __currency(name, prefix=None, suffix=None):
-        def tostr(value):
-            return '{prefix}{value:,.2f}{suffix}'.format(
-                    prefix=prefix or '',
-                    suffix=suffix or ('' if (prefix or suffix) else (' ' + name)),
-                    value=value)
-        return tostr
-
     CURRENCIES = {
-        'usd': Coins.__currency('usd', prefix='$'),
-        'eur': Coins.__currency('eur', suffix='€'),
-        'eth': Coins.__currency('eth', suffix='Ξ'),
-        'btc': Coins.__currency('btc', suffix='฿'),
-        'xmr': Coins.__currency('xmr'),
+        'usd': _currency('usd', prefix='$'),
+        'eur': _currency('eur', suffix='€'),
+        'eth': _currency('eth', suffix='Ξ'),
+        'btc': _currency('btc', suffix='฿'),
+        'xmr': _currency('xmr'),
     }
 
     @command