87 lines
2.2 KiB
Python
87 lines
2.2 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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from .render import Renderable
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class Explicable(Renderable):
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""" An Explicable object is an object which can be explicable!
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It's a parent class of a more classical Expression, Fraction and Polynom (and later square root)
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Child class will have the following method
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* explain: Generator which return steps which leed to himself
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"""
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def __init__(self, *args, **kwargs):
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super(Explicable, self).__init__()
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self.steps = []
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def explain(self, noself=True):
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""" Generate and render steps which leed to itself
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:param noself: does explain return self
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"""
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old_s = ''
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# les étapes pour l'atteindre
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try:
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for s in self.steps:
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try:
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new_s = self.STR_RENDER(s.postfix_tokens)
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except AttributeError:
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new_s = self.STR_RENDER(s)
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if not self.is_same_step(new_s, old_s):
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old_s = new_s
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yield new_s
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except AttributeError:
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pass
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if noself:
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# Lui même
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new_s = self.STR_RENDER(self.postfix_tokens)
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if not self.is_same_step(new_s, old_s):
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yield new_s
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def is_same_step(self, new, old):
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"""Return whether the new step is the same than old step
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"""
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try:
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if new.replace(" ", "") == old.replace(" ", ""):
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return True
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else:
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return False
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except AttributeError:
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if new == old:
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return True
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else:
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return False
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class Explicable_int(int, Explicable):
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isNumber = True
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def __init__(self, val):
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super(Explicable_int, self).__init__(val)
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self._val = val
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self.postfix_tokens = [self]
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self.steps = []
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def simplify(self):
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return Explicable_int(self._val)
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def __txt__(self):
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return str(self._val)
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def __tex__(self):
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return str(self._val)
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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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