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# -*- coding: utf-8 -*-
# Licensed under a 3-clause BSD style license - see LICENSE.rst
"""
Handles the "Unicode" unit format.
"""
from __future__ import (absolute_import, division, print_function,
unicode_literals)
from . import console, utils
class Unicode(console.Console):
"""
Output-only format to display pretty formatting at the console
using Unicode characters.
For example::
>>> import astropy.units as u
>>> print(u.bar.decompose().to_string('unicode'))
kg
100000 ────
m s²
"""
_times = "×"
_line = "─"
@classmethod
def _get_unit_name(cls, unit):
return unit.get_format_name('unicode')
@classmethod
def format_exponential_notation(cls, val):
m, ex = utils.split_mantissa_exponent(val)
parts = []
if m:
parts.append(m.replace('-', '−'))
if ex:
parts.append("10{0}".format(
cls._format_superscript(ex)))
return cls._times.join(parts)
@classmethod
def _format_superscript(cls, number):
mapping = {
'0': '⁰',
'1': '¹',
'2': '²',
'3': '³',
'4': '⁴',
'5': '⁵',
'6': '⁶',
'7': '⁷',
'8': '⁸',
'9': '⁹',
'-': '⁻',
'−': '⁻',
# This is actually a "raised omission bracket", but it's
# the closest thing I could find to a superscript solidus.
'/': '⸍',
}
output = []
for c in number:
output.append(mapping[c])
return ''.join(output)
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