82 lines
1.9 KiB
Python
82 lines
1.9 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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import types
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from .add import Add
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from .div import Div
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from .mul import Mul
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from .par import Par
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from .pw import Pw
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from .sub import Sub
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from .sub1 import Sub1
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class Operator_set(object):
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""" Class for sets of operators"""
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def __init__(self):
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""" Initiate the operator_set """
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self._operators = {}
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def get_op(self, op, arity = 2):
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"""Return the corresponding operator
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:op: symbole of the op
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:arity: the arity
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>>> op = Operator_set()
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>>> op.get_op('+')
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'+'
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>>> mul = op.get_op('*')
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>>> mul.tex
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'{op1} \\\\times {op2}'
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>>> mul.txt
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'{op1} * {op2}'
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"""
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try:
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return getattr(self, self._operators[(op, arity)])
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except KeyError:
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raise KeyError("{theOp} (arity: {arity}) is not available".format(theOp = op, arity = arity))
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def can_be_operator(cls, symbole):
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""" Tell if the symbole can be an operator """
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if type(symbole) == str:
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return symbole in [i[0] for i in cls._operators]
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else:
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return False
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def store_operator(self, operator):
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""" Save the operator as a method and
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:param operator: the operator (the class) (it will be accessible through .name method name.
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"""
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# TODO: faire une vérif si on peut utiliser operator_name |mar. févr. 23 09:09:44 EAT 2016
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self._operators[operator.uniq_desc()] = operator.name
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setattr(self, operator.name, operator)
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op = Operator_set()
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op.store_operator(Add())
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op.store_operator(Div())
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op.store_operator(Mul())
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op.store_operator(Par())
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op.store_operator(Pw())
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op.store_operator(Sub())
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op.store_operator(Sub1())
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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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