1 files changed, 37 insertions, 0 deletions
diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..2b3be5d
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,37 @@
+#
+# Useful utilities.
+#
+#
+# A simple class for accumulating counts or lists
+#
+class accumulator:
+    def __init__(self):
+        self._data = { }
+
+    def incr(self, key, increment = 1):
+        try:
+            self._data[key] += increment
+        except KeyError:
+            self._data[key] = increment
+
+    def get(self, key, default = None):
+        try:
+            return self._data[key]
+        except KeyError:
+            return default
+
+    def append(self, key, item, unique = False):
+        if unique and self._data.has_key(key) and \
+           item in self._data[key]:
+            return
+        try:
+            self._data[key].append(item)
+        except KeyError:
+            self._data[key] = [item]
+
+    def keys(self):
+        return self._data.keys()
+
+    def __getitem__(self, key):
+        return self._data[key]
+