74 lines
1.5 KiB
Python
74 lines
1.5 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: practical envelop of math object
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"""
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from ..renders import renders
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class Token(object):
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""" Token: practical envelop of an math object """
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RENDER = 'txt'
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def __init__(self, mo, name="", ancestor = None):
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self._mo = mo
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self.name = name
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self._mathtype = None
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self._ancestor = ancestor
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@classmethod
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def random(cls):
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raise NotImplemented
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def explain(self):
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""" Yield every calculus step which have lead to self
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:example:
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>>> from mapytex.calculus.API import Expression
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>>> e = Expression.from_str("2+3*4")
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>>> f = e.simplify()
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>>> f
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<Integer 14>
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>>> for s in f.explain():
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... print(s)
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2 + 3 * 4
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2 + 12
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14
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"""
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try:
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yield from self._ancestor.explain()
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yield self
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except AttributeError:
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yield self
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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 renders[self.RENDER](self._mo)
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@property
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def __txt__(self):
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return self._mo.__txt__
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@property
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def __tex__(self):
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return self._mo.__tex__
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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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