[FIX] pylint: using variable before assignment

Since last version (1.7) of pylint, new errors have been detected.

Related to rev: https://github.com/odoo/odoo/commit/ecac88dcc074b81ede4925a75080e8d2b4975924

odoo/addons/base/res/res_lang.py

@@ -259,7 +259,7 @@ class Lang(models.Model):
 
             if percent[-1] in 'eEfFgG':
                 parts = formatted.split('.')
-                parts[0], _ = intersperse(parts[0], eval_lang_grouping, thousands_sep)
+                parts[0] = intersperse(parts[0], eval_lang_grouping, thousands_sep)[0]
 
                 formatted = decimal_point.join(parts)
 

odoo/osv/orm.py

@@ -118,13 +118,13 @@ def test_modifiers(what, expected):
         node = etree.fromstring(what)
         transfer_node_to_modifiers(node, modifiers)
         simplify_modifiers(modifiers)
-        json = json.dumps(modifiers)
-        assert json == expected, "%s != %s" % (json, expected)
+        dump = json.dumps(modifiers)
+        assert dump == expected, "%s != %s" % (dump, expected)
     elif isinstance(what, dict):
         transfer_field_to_modifiers(what, modifiers)
         simplify_modifiers(modifiers)
-        json = json.dumps(modifiers)
-        assert json == expected, "%s != %s" % (json, expected)
+        dump = json.dumps(modifiers)
+        assert dump == expected, "%s != %s" % (dump, expected)
 
 
 # To use this test: