93 lines
2.0 KiB
Python
93 lines
2.0 KiB
Python
#! /usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
# vim:fenc=utf-8
|
|
#
|
|
# Copyright © 2017 lafrite <lafrite@Poivre>
|
|
#
|
|
# Distributed under terms of the MIT license.
|
|
|
|
"""
|
|
Tokens: practical envelop of math object
|
|
|
|
"""
|
|
from ..renders import renders
|
|
|
|
class Token(object):
|
|
|
|
""" Token: practical envelop of an math object """
|
|
|
|
RENDER = 'txt'
|
|
|
|
def __init__(self, mo, name="", ancestor = None):
|
|
self._mo = mo
|
|
self.name = name
|
|
self._mathtype = None
|
|
self._ancestor = ancestor
|
|
|
|
@classmethod
|
|
def random(cls):
|
|
raise NotImplemented
|
|
|
|
def explain(self):
|
|
""" Yield every calculus step which have lead to self
|
|
|
|
:example:
|
|
>>> from mapytex.calculus.API import Expression
|
|
>>> e = Expression.from_str("2+3*4")
|
|
>>> f = e.simplify()
|
|
>>> f
|
|
<Integer 14>
|
|
>>> for s in f.explain():
|
|
... print(s)
|
|
2 + 3 * 4
|
|
2 + 12
|
|
14
|
|
"""
|
|
try:
|
|
yield from self._ancestor.explain()
|
|
yield self
|
|
except AttributeError:
|
|
yield self
|
|
|
|
def __repr__(self):
|
|
return f"<{self.__class__.__name__} {self.__txt__}>"
|
|
|
|
def __str__(self):
|
|
return renders[self.RENDER](self._mo)
|
|
|
|
@property
|
|
def __txt__(self):
|
|
return self._mo.__txt__
|
|
|
|
@property
|
|
def __tex__(self):
|
|
return self._mo.__tex__
|
|
|
|
def __add__(self, other):
|
|
""" Adding 2 Tokens or a Token and a Expression
|
|
|
|
:example:
|
|
>>> from .number import Integer
|
|
>>> a = Integer(3)
|
|
|
|
"""
|
|
from ..expression import Expression
|
|
from ...core import Tree
|
|
from . import factory
|
|
if not isinstance(other, Token):
|
|
_other = factory(other)
|
|
else:
|
|
_other = other
|
|
tree = Tree('+', self.mo, _other.mo)
|
|
ans = Expression(tree).simplify()
|
|
return ans
|
|
|
|
|
|
|
|
|
|
|
|
# -----------------------------
|
|
# Reglages pour 'vim'
|
|
# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
|
|
# cursor: 16 del
|