62 lines
1.3 KiB
Python
62 lines
1.3 KiB
Python
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#!/usr/bin/env python
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# encoding: utf-8
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from .operator import Operator
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from ..generic import flatten_list
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class Sub1(Operator):
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""" The operator -
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>>> sub1 = op.sub1
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>>> sub1
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'-'
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>>> sub1(1)
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-1
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>>> sub1.__tex__('1')
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'- 1'
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>>> sub1.__txt__('1')
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'- 1'
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>>> sub1.__tex__('-1')
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'- (-1)'
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"""
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_CARACT = {
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"operator" : "-", \
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"name" : "sub1",\
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"priority" : 3, \
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"arity" : 1, \
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"actions" : "__neg__",\
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"txt" : "- {op1}",\
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"tex" : "- {op1}",\
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}
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def __init__(self):
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""" Initiate Sub1 Operator """
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super(Sub1, self).__init__(**self._CARACT)
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def l_parenthesis(self, op, str_join=False):
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""" Add parenthesis if necessary """
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try:
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if op.mainOp.priority <= self.priority:
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op = flatten_list(["("] + [op] + [")"])
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except AttributeError:
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# op has not the attribute priority
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try:
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if int(op) < 0:
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op = ['(', op, ')']
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except ValueError:
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pass
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ans = flatten_list([op])
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if str_join:
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ans = ' '.join([str(i) for i in ans])
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return ans
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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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