[#8530] remove uses of tuple parameter unpacking

While sometimes convenient, the ability to unpack tuple parameters (to
lambdas and functions) was removed from Python 3. Either use the tuple
directly or unpack it in the function body.

(lib2to3.fixes.fix_tuple_params)

addons/payment_buckaroo/models/payment.py

@@ -71,7 +71,7 @@ class AcquirerBuckaroo(models.Model):
                     del values[key]
                     break
 
-            items = sorted(values.items(), key=lambda (x, y): x.lower())
+            items = sorted(values.items(), key=lambda pair: pair[0].lower())
             sign = ''.join('%s=%s' % (k, urllib.unquote_plus(v)) for k, v in items)
         else:
             sign = ''.join('%s=%s' % (k, get_value(k)) for k in keys)

odoo/addons/base/res/res_users.py

@@ -780,7 +780,7 @@ class GroupsView(models.Model):
                 others += g
         # build the result
         res = []
-        for app, gs in sorted(by_app.iteritems(), key=lambda (a, _): a.sequence or 0):
+        for app, gs in sorted(by_app.iteritems(), key=lambda it: it[0].sequence or 0):
             res.append(linearize(app, gs))
         if others:
             res.append((self.env['ir.module.category'], 'boolean', others))