Initial import from Docker volume

model/symbol.py

@@ -0,0 +1,21 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from trytond.rpc import RPC
+
+
+class SymbolMixin(object):
+    __slots__ = ()
+
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        cls.__rpc__.update({
+                'get_symbol': RPC(instantiate=0, cache=dict(days=1)),
+                })
+
+    def get_symbol(self, sign, symbol=None):
+        'Return the symbol and its position'
+        position = 1
+        if symbol is None:
+            symbol = getattr(self, 'symbol', None)
+        return symbol, position