From ac31c049804472a0e9ad2ab3769ee4ed79f53bea Mon Sep 17 00:00:00 2001
From: Thomas Jost <schnouki@schnouki.net>
Date: Wed, 31 Oct 2012 17:40:59 +0100
Subject: [PATCH] Add formatter config option

---
 pygal/config.py     | 4 ++++
 pygal/graph/base.py | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/pygal/config.py b/pygal/config.py
index 17e127c..f306019 100644
--- a/pygal/config.py
+++ b/pygal/config.py
@@ -154,6 +154,10 @@ class Config(object):
         False, bool, "Value", "Display values in human readable format",
         "(ie: 12.4M)")
 
+    formatter = Key(
+        None, callable, "Value",
+        "Function used to convert values into human readable format")
+
     logarithmic = Key(
         False, bool, "Value", "Display values in logarithmic scale")
 
diff --git a/pygal/graph/base.py b/pygal/graph/base.py
index 5b413d2..6140d54 100644
--- a/pygal/graph/base.py
+++ b/pygal/graph/base.py
@@ -80,7 +80,12 @@ class BaseGraph(object):
     @property
     def _format(self):
         """Return the value formatter for this graph"""
-        return humanize if self.human_readable else str
+        if self.formatter is not None:
+            return self.formatter
+        elif self.human_readable:
+            return humanize
+        else:
+            return str
 
     def _compute(self):
         """Initial computations to draw the graph"""