properly added new files to git and added test

pint/babel_units.py

@@ -0,0 +1,139 @@
+# -*- coding: utf-8 -*-
+"""
+    pint.babel
+    ~~~~~~~~~~
+
+    :copyright: 2016 by Pint Authors, see AUTHORS for more details.
+    :license: BSD, see LICENSE for more details.
+"""
+
+babel_units = dict(
+   	standard_gravity='acceleration-g-force',
+	millibar='pressure-millibar',
+	metric_ton='mass-metric-ton',
+	megawatt='power-megawatt',
+	degF='temperature-fahrenheit',
+	dietary_calorie='energy-foodcalorie',
+	millisecond='duration-millisecond',
+	mph='speed-mile-per-hour',
+	acre_foot='volume-acre-foot',
+	mebibit='digital-megabit',
+	gibibit='digital-gigabit',
+	tebibit='digital-terabit',
+	mebibyte='digital-megabyte',
+	kibibyte='digital-kilobyte',
+	mm_Hg='pressure-millimeter-of-mercury',
+	month='duration-month',
+	kilocalorie='energy-kilocalorie',
+	cubic_mile='volume-cubic-mile',
+	arcsecond='angle-arc-second',
+	byte='digital-byte',
+	metric_cup='volume-cup-metric',
+	kilojoule='energy-kilojoule',
+	meter_per_second_squared='acceleration-meter-per-second-squared',
+	pint='volume-pint',
+	square_centimeter='area-square-centimeter',
+	in_Hg='pressure-inch-hg',
+	milliampere='electric-milliampere',
+	arcminute='angle-arc-minute',
+	MPG='consumption-mile-per-gallon',
+	hertz='frequency-hertz',
+	day='duration-day',
+	mps='speed-meter-per-second',
+	kilometer='length-kilometer',
+	square_yard='area-square-yard',
+	kelvin='temperature-kelvin',
+	kilogram='mass-kilogram',
+	kilohertz='frequency-kilohertz',
+	megahertz='frequency-megahertz',
+	meter='length-meter',
+	cubic_inch='volume-cubic-inch',
+	kilowatt_hour='energy-kilowatt-hour',
+	second='duration-second',
+	yard='length-yard',
+	light_year='length-light-year',
+	millimeter='length-millimeter',
+	metric_horsepower='power-horsepower',
+	gibibyte='digital-gigabyte',
+	## 'temperature-generic',
+	liter='volume-liter',
+	turn='angle-revolution',
+	microsecond='duration-microsecond',
+	pound='mass-pound',
+	ounce='mass-ounce',
+	calorie='energy-calorie',
+	centimeter='length-centimeter',
+	inch='length-inch',
+	centiliter='volume-centiliter',
+	troy_ounce='mass-ounce-troy',
+	gream='mass-gram',
+	kilowatt='power-kilowatt',
+	knot='speed-knot',
+	lux='light-lux',
+	hectoliter='volume-hectoliter',
+	microgram='mass-microgram',
+	degC='temperature-celsius',
+	tablespoon='volume-tablespoon',
+	cubic_yard='volume-cubic-yard',
+	square_foot='area-square-foot',
+	tebibyte='digital-terabyte',
+	square_inch='area-square-inch',
+	carat='mass-carat',
+	hectopascal='pressure-hectopascal',
+	gigawatt='power-gigawatt',
+	watt='power-watt',
+	micrometer='length-micrometer',
+	volt='electric-volt',
+	bit='digital-bit',
+	gigahertz='frequency-gigahertz',
+	teaspoon='volume-teaspoon',
+	ohm='electric-ohm',
+	joule='energy-joule',
+	cup='volume-cup',
+	square_mile='area-square-mile',
+	nautical_mile='length-nautical-mile',
+	square_meter='area-square-meter',
+	mile='length-mile',
+	acre='area-acre',
+	nanometer='length-nanometer',
+	hour='duration-hour',
+	astronomical_unit='length-astronomical-unit',
+	liter_per_100kilometers ='consumption-liter-per-100kilometers',
+	megaliter='volume-megaliter',
+	ton='mass-ton',
+	hectare='area-hectare',
+	square_kilometer='area-square-kilometer',
+	kibibit='digital-kilobit',
+	mile_scandinavian='length-mile-scandinavian',
+	liter_per_kilometer='consumption-liter-per-kilometer',
+	century='duration-century',
+	cubic_foot='volume-cubic-foot',
+	deciliter='volume-deciliter',
+	##pint='volume-pint-metric',
+	cubic_meter='volume-cubic-meter',
+	cubic_kilometer='volume-cubic-kilometer',
+	quart='volume-quart',
+	cc='volume-cubic-centimeter',
+	pound_force_per_square_inch='pressure-pound-per-square-inch',
+	milligram='mass-milligram',
+	kph='speed-kilometer-per-hour',
+	minute='duration-minute',
+	parsec='length-parsec',
+	picometer='length-picometer',
+	degree='angle-degree',
+	milliwatt='power-milliwatt',
+	week='duration-week',
+	ampere='electric-ampere',
+	milliliter='volume-milliliter',
+	decimeter='length-decimeter',
+	fluid_ounce='volume-fluid-ounce',
+	nanosecond='duration-nanosecond',
+	foot='length-foot',
+	karat='proportion-karat',
+	year='duration-year',
+	gallon='volume-gallon',
+	radian='angle-radian',
+)
+
+babel_forms = ['narrow', 'short', 'long']
+

pint/compat/__init__.py

@@ -127,3 +127,12 @@ except ImportError:
     ufloat = None
     HAS_UNCERTAINTIES = False
 
+try:
+    from babel import Locale as Loc
+    HAS_BABEL = True
+    HAS_PROPER_BABEL = hasattr(Loc, 'unit_patterns')
+except ImportError:
+    HAS_PROPER_BABEL = HAS_BABEL = False
+
+if not HAS_PROPER_BABEL:
+    Loc = None

pint/formatting.py

@@ -114,6 +114,9 @@ def formatter(items, as_ratio=True, single_denominator=False,
     :param division_fmt: the format used for division.
     :param power_fmt: the format used for exponentiation.
     :param parentheses_fmt: the format used for parenthesis.
+    :param locale: the locale object as defined in babel.
+    :param form: the length of the translated unit, as defined in babel cldr.
+    :param plural_form: the plural form, calculated as defined in babel.
 
     :return: the formula as a string.
     """
@@ -129,7 +132,7 @@ def formatter(items, as_ratio=True, single_denominator=False,
     pos_terms, neg_terms = [], []
 
     for key, value in sorted(items):
-        if locale and form and plural_form:
+        if locale and form and plural_form and hasattr(locale, 'unit_patterns'):
             _key = babel_units.get(key)
             if _key:
                 patterns = locale.unit_patterns

pint/testsuite/helpers.py

@@ -7,7 +7,7 @@ import doctest
 from distutils.version import StrictVersion
 import re
 
-from pint.compat import unittest, HAS_NUMPY, HAS_UNCERTAINTIES, NUMPY_VER, PYTHON3
+from pint.compat import unittest, HAS_NUMPY, HAS_PROPER_BABEL, HAS_UNCERTAINTIES, NUMPY_VER, PYTHON3
 
 
 def requires_numpy18():
@@ -30,6 +30,10 @@ def requires_not_numpy():
     return unittest.skipIf(HAS_NUMPY, 'Requires NumPy is not installed.')
 
 
+def requires_proper_babel():
+    return unittest.skipUnless(HAS_PROPER_BABEL, 'Requires Babel with units support')
+
+
 def requires_uncertainties():
     return unittest.skipUnless(HAS_UNCERTAINTIES, 'Requires Uncertainties')
 

pint/testsuite/test_babel.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+from __future__ import division, unicode_literals, print_function, absolute_import
+
+from pint.compat import Loc
+from pint.testsuite import helpers, BaseTestCase
+from pint import UnitRegistry
+
+class TestBabel(BaseTestCase):
+
+    @helpers.requires_proper_babel()
+    def test_babel(self):
+        ureg = UnitRegistry()
+        ureg.load_definitions('../xtranslated.txt')
+        locale = Loc('fr', 'FR')
+
+        distance = 24.0 * ureg.meter
+        self.assertEqual(
+            distance.format_babel(locale=locale, form='long'),
+            u'24.0 mètres'
+        )
+        time = 8.0 * ureg.second
+        self.assertEqual(
+            time.format_babel(locale=locale, form='long'),
+            u'8.0 secondes'
+        )
+        velocity = distance / time ** 2
+        self.assertEqual(
+            velocity.format_babel(locale=locale, form='long'),
+            u'0.375 mètre par seconde²'
+        )

pint/xtranslated.txt

@@ -0,0 +1,26 @@
+
+# a few unit definitions added to use the translations by unicode cldr
+
+dietary_calorie = 1000 * calorie = Calorie
+metric_cup = liter / 4
+mps = meter / second
+square_inch = inch ** 2 = sq_in
+square_mile = mile ** 2 = sq_mile
+square_meter = kilometer ** 2 = sq_m
+square_kilometer = kilometer ** 2 = sq_km
+mile_scandinavian = 10000 * meter
+century = 100 * year
+cubic_mile = 1 * mile ** 3 = cu_mile = cubic_miles
+cubic_yard = 1 * yard ** 3 = cu_yd = cubic_yards
+cubic_foot = 1 * foot ** 3 = cu_ft = cubic_feet
+cubic_inch = 1 * inch ** 3 = cu_in = cubic_inches
+cubic_meter = 1 * meter ** 3 = cu_m
+cubic_kilometer = 1 * kilometer ** 3 = cu_km
+karat = [purity] = Karat
+
+[consumption] = [volume] / [length]
+liter_per_kilometer = liter / kilometer
+liter_per_100kilometers = liter / (100 * kilometers)
+
+[US_consumption] = [length] / [volume]
+MPG = mile / gallon