Ticket #6391: filesizeformat.diff

django/contrib/humanize/templatetags/humanize.py

@@ -4 +4 @@
 from django.template import defaultfilters
 from django.conf import settings
 from datetime import date, timedelta
+import math
 import re
 
 register = template.Library()
@@ -98 +99 @@
         return _(u'yesterday')
     return defaultfilters.date(value, arg)
 register.filter(naturalday)
+
+def filesizeformat(bytes, precision=2):
+    """ Returns a human readable string of a byte count. """
+    bytes = int(bytes)
+    if bytes is 0:
+        return u'0%s' % _(u'bytes')
+    log = math.floor(math.log(bytes, 1024))
+    return "%.*f%s" % (
+        precision,
+        bytes / math.pow(1024, log),
+        [_(u'bytes'), u'kb', u'mb', u'gb', u'tb', u'pb', u'eb', u'zb', u'yb'][int(log)]
+        )
+register.filter(filesizeformat)
+

docs/add_ons.txt

@@ -141 +141 @@
 
 You can pass in either an integer or a string representation of an integer.
 
+filesizeformat
+--------------
+
+Converts a byte count into a human readable string like "2Mb". Accepts an
+optional ``precision`` parameter which defaults to 2.
+
+Examples:
+
+    * ``3352576`` becomes ``3.20mb``
+    * ``623394`` becomes ``608.78kb``
+
 ordinal
 -------