326 lines
8.4 KiB
Python
326 lines
8.4 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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from decimal import Decimal
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from .exceptions import MOError
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from ..coroutine import coroutine, STOOOP
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from ..renders import tree2txt, tree2tex
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from functools import total_ordering
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__all__ = ["moify", "MO", "MOstr"]
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@coroutine
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def moify(target):
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""" Coroutine which try to convert everything into an MO """
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try:
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target_ = target()
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except TypeError:
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target_ = target
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try:
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while True:
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tok = yield
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try:
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target_.send(MOnumber(tok))
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except MOError:
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try:
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target_.send(MOstr(tok))
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except MOError:
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target_.send(tok)
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except STOOOP as err:
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yield target_.throw(err)
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class MO(object):
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"""MO for math object
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This base class is representing int and Decimal. It stocks its value in
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self.value and it
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"""
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def __init__(self, value):
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""" Initiate the MO
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It should be idempotent.
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>>> a = MO(3)
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>>> a
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<MO 3>
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>>> a = MO(a)
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>>> a
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<MO 3>
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"""
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try:
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self.value = value.value
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except AttributeError:
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self.value = value
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self.is_scalar = True
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@classmethod
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def factory(cls, value):
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""" Factory to ensure that a value is a MO before using it
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Idempotent??
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>>> MO.factory("x")
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<MOstr x>
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>>> MO.factory(2)
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<MOnumber 2>
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>>> MO.factory(2.3)
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<MOnumber 2.29999999999999982236431605997495353221893310546875>
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>>> MO.factory(Decimal("2.3"))
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<MOnumber 2.3>
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>>> x = MO.factory("x")
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>>> MO.factory(x)
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<MOstr x>
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"""
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if isinstance(value, str):
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return MOstr(value)
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elif isinstance(value, int) \
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or isinstance(value, Decimal) \
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or isinstance(value, float):
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return MOnumber(value)
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elif isinstance(value, MO):
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return value
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raise MOError("Can't convert it into a MO."
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f"Need str, int, Decimal, float or MO, got {value}")
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def __repr__(self):
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return f"<{self.__class__.__name__} {self.__txt__}>"
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def __str__(self):
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return str(self.value)
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@property
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def __txt__(self):
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try:
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return tree2txt(self.value)
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except AttributeError:
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return str(self.value)
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@property
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def __tex__(self):
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try:
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return tree2tex(self.value)
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except AttributeError:
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return str(self.value)
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def __hash__(self):
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return self.value.__hash__()
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def __eq__(self, other):
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""" == a MOnumber """
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try:
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return self.value == other.value
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except AttributeError:
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return self.value == other
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@total_ordering
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class MOnumber(MO):
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""" Base number math object (int or Decimal) """
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def __init__(self, value):
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""" Initiate a number MO
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>>> MOnumber(23)
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<MOnumber 23>
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>>> MOnumber(-23)
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<MOnumber - 23>
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>>> MOnumber(23.3)
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<MOnumber 23.300000000000000710542735760100185871124267578125>
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>>> MOnumber(Decimal("23.3"))
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<MOnumber 23.3>
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>>> MOnumber(Decimal("-23.3"))
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<MOnumber - 23.3>
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>>> a = MOnumber(23)
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>>> MOnumber(a)
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<MOnumber 23>
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>>> MOnumber("a")
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Traceback (most recent call last):
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...
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mapytex.calculus.core.MO.exceptions.MOError: The value of an MOnumber need to be a int, a float or a Decimal
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"""
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try:
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val = value.value
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except AttributeError:
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val = value
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if isinstance(val, (int, Decimal)):
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MO.__init__(self, value)
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elif isinstance(val, float):
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MO.__init__(self, Decimal(val))
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else:
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raise MOError("The value of an MOnumber need to be a int, a float or a Decimal")
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@property
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def __txt__(self):
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if self.value >= 0:
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return str(self.value)
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return f"- {abs(self.value)}"
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@property
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def __tex__(self):
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if self.value > 0:
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return str(self.value)
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return f"- {abs(self.value)}"
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def __add__(self, other):
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""" Adding a MOnumber """
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try:
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return self.value + other.value
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except AttributeError:
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return self.value + other
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def __radd__(self, other):
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""" rAdding a MOnumber """
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try:
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return self.value + other.value
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except AttributeError:
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return self.value + other
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def __sub__(self, other):
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""" Subing a MOnumber """
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try:
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return self.value - other.value
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except AttributeError:
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return self.value - other
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def __rsub__(self, other):
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""" rSubing a MOnumber """
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try:
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return self.value - other.value
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except AttributeError:
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return self.value - other
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def __mul__(self, other):
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""" Multiply a MOnumber """
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try:
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return self.value * other.value
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except AttributeError:
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return self.value * other
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def __rmul__(self, other):
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""" rMultiply a MOnumber """
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try:
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return self.value * other.value
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except AttributeError:
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return self.value * other
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def __truediv__(self, other):
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""" Divide a MOnumber """
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try:
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return self.value / other.value
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except AttributeError:
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return self.value / other
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def __rtruediv__(self, other):
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""" rDivide a MOnumber """
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try:
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return self.value / other.value
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except AttributeError:
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return self.value / other
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def __floordiv__(self, other):
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""" Integer Division a MOnumber """
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try:
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return self.value // other.value
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except AttributeError:
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return self.value // other
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def __rfloordiv__(self, other):
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""" rInteger Division a MOnumber """
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try:
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return other.value // self.value
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except AttributeError:
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return other // self.value
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def __mod__(self, other):
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""" Moduling a MOnumber """
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try:
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return self.value % other.value
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except AttributeError:
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return self.value % other
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def __rmod__(self, other):
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""" rModuling a MOnumber """
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try:
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return other.value % self.value
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except AttributeError:
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return other % self.value
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def __lt__(self, other):
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""" < a MOnumber """
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try:
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return self.value < other.value
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except AttributeError:
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return self.value < other
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class MOstr(MO):
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""" Unknown math object like x or n"""
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def __init__(self, value):
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""" Initiate a string MO
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>>> a = MOstr("x")
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>>> a
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<MOstr x>
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>>> b = MOstr(a)
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>>> b
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<MOstr x>
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>>> a = MOstr("+")
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Traceback (most recent call last):
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...
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mapytex.calculus.core.MO.exceptions.MOError: An MOstr should be initiate with a alpha string, got +
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>>> MOstr("ui")
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Traceback (most recent call last):
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...
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mapytex.calculus.core.MO.exceptions.MOError: An MOstr should be initiate with a single caracter string, got ui
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>>> MOstr(2)
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Traceback (most recent call last):
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...
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mapytex.calculus.core.MO.exceptions.MOError: An MOstr should be initiate with a string - the unknown, got 2
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"""
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try:
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val = value.value
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except AttributeError:
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val = value
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if not isinstance(val, str):
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raise MOError(f"An MOstr should be initiate with a string - the unknown, got {val}")
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if len(val) != 1:
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raise MOError(f"An MOstr should be initiate with a single caracter string, got {val}")
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if not val.isalpha():
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raise MOError(f"An MOstr should be initiate with a alpha string, got {val}")
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MO.__init__(self, val)
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self.is_scalar = False
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self._variable = val
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@property
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def variable(self):
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return self._variable
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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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