From d6c5dbc925e63bebc048356c4a54a1ad6b364014 Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Sun, 1 Nov 2020 17:00:45 +0100
Subject: Explain design decisions

Fixes #10.
---
 lulua/report.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lulua/report.py')

diff --git a/lulua/report.py b/lulua/report.py
index 8a50681..b25201d 100644
--- a/lulua/report.py
+++ b/lulua/report.py
@@ -21,6 +21,7 @@
 import sys, argparse, logging, pickle, math
 from gettext import GNUTranslations, NullTranslations
 from decimal import Decimal
+from fractions import Fraction
 
 import yaml
 from jinja2 import Environment, PackageLoader
@@ -40,6 +41,11 @@ def approx (i, lang='en'):
         units.pop (0)
     return round (i, 1), units[0]
 
+def fraction (n, maxdenom=10):
+    """ Turn floating number n into a human-digestable fraction """
+    f = Fraction (n).limit_denominator (maxdenom)
+    return f'{f.numerator}\u2044{f.denominator}'
+
 def numspace (s):
     """ Replace ordinary spaces with unicode FIGURE SPACE """
     return s.replace (' ', '\u2007')
@@ -83,6 +89,7 @@ def render ():
     env.filters['numspace'] = numspace
     env.filters['arabnum'] = arabnum
     env.filters['blendn'] = blendn
+    env.filters['fraction'] = fraction
 
     corpus = []
     for x in args.corpus:
-- 
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