diff -r 7b82dc1fb6f5 -r 515fadd3d286 pgtoolkit/prettysize.py
--- a/pgtoolkit/prettysize.py	Wed Apr 10 11:22:15 2013 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,67 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# prettysize - print data sizes in format easily readable by humans
-#
-# Copyright (c) 2011  Radek Brich <radek.brich@devl.cz>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-
-iec_prefixes = ('Ki', 'Mi', 'Gi', 'Ti', 'Pi', 'Ei', 'Zi', 'Yi')
-si_prefixes = 'kMGTPEZY'
-big_prefixes = 'KMGTPEZY'
-
-
-def prettysize(num, base=1024, prefixes=si_prefixes, unit='B', sep=' '):
-    '''Convert data size in bytes to human readable aproximation.
-
-    Beware that default output is invalid by recent standardization.
-    Still, this form was in use for ages.
-
-    For standardized output, see prettysize_si and prettysize_iec.
-
-    '''
-    prefixes = list(prefixes)
-    prefix = ''
-    num = float(num)
-    while True:
-        if num < base:
-            # format number
-            out = '{:.2f}'.format(num)
-            # cut off trailing zeros
-            out = out.rstrip('0')
-            if out.endswith('.'):
-                out = out[:-1]
-            return out + sep + prefix + unit
-        num /= base
-        prefix = prefixes.pop(0)
-
-    raise OverflowError('Number is too large.')
-
-
-def prettysize_si(num, **kw):
-    return prettysize(num, base=1000, **kw)
-
-
-def prettysize_short(num):
-    return prettysize(num, unit='', sep='', prefixes=big_prefixes)
-
-
-def prettysize_iec(num):
-    return prettysize(num, prefixes=iec_prefixes)
-