Refactoring: dispatch "core" package modules into structs and utils, as it does not have a lot of sense anymore.

bonobo/util/statistics.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+#
+# copyright 2012-2014 romain dorgueil
+#
+# licensed under the apache license, version 2.0 (the "license");
+# you may not use this file except in compliance with the license.
+# you may obtain a copy of the license at
+#
+#     http://www.apache.org/licenses/license-2.0
+#
+# unless required by applicable law or agreed to in writing, software
+# distributed under the license is distributed on an "as is" basis,
+# without warranties or conditions of any kind, either express or implied.
+# see the license for the specific language governing permissions and
+# limitations under the license.
+
+
+class WithStatistics:
+    def __init__(self, *names):
+        self.statistics_names = names
+        self.statistics = {name: 0 for name in names}
+
+    def get_statistics(self, *args, **kwargs):
+        return ((name, self.statistics[name]) for name in self.statistics_names)
+
+    def get_statistics_as_string(self, *args, **kwargs):
+        stats = tuple('{0}={1}'.format(name, cnt) for name, cnt in self.get_statistics(*args, **kwargs) if cnt > 0)
+        return (kwargs.get('prefix', '') + ' '.join(stats)) if len(stats) else ''
+
+    def increment(self, name):
+        self.statistics[name] += 1