Mapytex/pymath/calculus/operator/div.py

#!/usr/bin/env python
# encoding: utf-8

from .operator import Operator, save_mainOp

class Div(Operator):
    r""" The operator /

    >>> div = Div()
    >>> div
    /
    >>> div(1, 2)
    < Fraction 1 / 2>
    >>> div.__tex__('1','2')
    '\\frac{ 1 }{ 2 }'
    >>> div.__tex__('-1','2')
    '\\frac{ -1 }{ 2 }'
    >>> div.__tex__('1','-2')
    '\\frac{ 1 }{ -2 }'
    >>> div.__txt__('1','2')
    '1 / 2'
    >>> div.__txt__('-1','2')
    '-1 / 2'
    >>> div.__txt__('1','-2')
    '1 / ( -2 )'
    """

    _CARACT = {
        "operator" : "/", \
        "name" : "div",\
        "priority" : 5, \
        "arity" : 2, \
        "txt" :  "{op1} / {op2}",\
        "tex" : "\\frac{{ {op1} }}{{ {op2} }}",\
    }

    def __init__(self):
        """ Initiate Div Operator """
        super(Div, self).__init__(**self._CARACT)

    def __call__(self, op1, op2):
        if op2 == 1:
            return op1
        else:
            from ..fraction import Fraction
            return Fraction(op1,op2)

    def __tex__(self, *args):
        # Pas besoin de parenthèses en plus pour \frac
        replacement = {"op"+str(i+1): op for (i,op) in enumerate(args)}

        ans = self.tex.format(**replacement)
        ans = save_mainOp(ans, self)
        return ans


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