131 lines
3.0 KiB
Python
131 lines
3.0 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# vim:fenc=utf-8
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#
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# Copyright © 2017 lafrite <lafrite@Poivre>
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#
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# Distributed under terms of the MIT license.
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"""
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Tokens representing interger and decimal
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"""
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from .token import Token
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from ...core.MO import MO, MOnumber
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from ...core.MO.fraction import MOFraction
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from decimal import Decimal as _Decimal
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__all__ = ["Integer", "Decimal"]
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class Integer(Token):
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""" Token representing a integer
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:example:
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>>> Integer(4)
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<Integer 4>
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>>> a = MOnumber(4)
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>>> Integer.from_mo(a)
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<Integer 4>
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"""
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def __init__(self, a, name="", ancestor=None):
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if not isinstance(a, MO):
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if not isinstance(a, int):
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raise TypeError
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mo = MOnumber(a)
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else:
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mo = a
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Token.__init__(self, mo, name, ancestor)
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self._mathtype = 'entier'
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@classmethod
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def from_mo(cls, mo, name="", ancestor=None):
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if not isinstance(mo, MOnumber):
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raise TypeError
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if not isinstance(mo.value, int):
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raise TypeError
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return cls(mo, name, ancestor)
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@classmethod
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def random(cls):
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raise NotImplemented
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class Decimal(Token):
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""" Token representing a decimal """
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def __init__(self, a, name="", ancestor=None):
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if not isinstance(a, MO):
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if isinstance(a, (str, float)):
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mo = MOnumber(Decimal(a))
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else:
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raise TypeError
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else:
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mo = a
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self._mathtype = 'décimal'
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Token.__init__(self, mo, name, ancestor)
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@classmethod
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def from_mo(cls, mo, name="", ancestor=None):
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if not isinstance(mo, MOnumber):
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raise TypeError
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if not isinstance(mo.value, _Decimal):
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raise TypeError
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return cls(mo, name, ancestor)
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@classmethod
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def random(cls):
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raise NotImplemented
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class Fraction(Token):
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""" Token representing a fraction """
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def __init__(self, a, name="", ancestor=None):
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if not isinstance(a, MO):
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if isinstance(a, str):
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num, denom = a.split('/')
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mo = MOFraction(int(num), int(denom))
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else:
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raise TypeError
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else:
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mo = a
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self._mathtype = 'fraction'
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Token.__init__(self, mo, name, ancestor)
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@classmethod
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def from_mo(cls, mo, name="", ancestor=None):
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if not isinstance(mo, MOFraction):
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raise TypeError
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if not isinstance(mo._numerator, MOnumber):
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raise TypeError
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if not isinstance(mo._denominator, MOnumber):
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raise TypeError
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return cls(mo, name, ancestor)
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@classmethod
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def random(cls):
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raise NotImplemented
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@property
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def numerator(self):
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return self._mo.numerator
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@property
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def denominator(self):
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return self._mo.denominator
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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