# -*- coding: utf-8 -*-
# Mathmaker creates automatically maths exercises sheets
# with their answers
# Copyright 2006-2017 Nicolas Hainaux <nh.techn@gmail.com>
# This file is part of Mathmaker.
# Mathmaker is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# any later version.
# Mathmaker is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with Mathmaker; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import random
from mathmakerlib.calculus import Fraction, Number
from mathmaker.lib import shared
from mathmaker.lib.constants.latex import COLORED_QUESTION_MARK
from mathmaker.lib.core.base_calculus import Item
from mathmaker.lib.core.root_calculus import Value
from mathmaker.lib.document.content import component
[docs]class sub_object(component.structure):
def __init__(self, build_data, hidden=None, **options):
super().setup('numbers', nb=build_data, shuffle_nbs=False,
standardize_decimal_numbers=True, **options)
if hidden is None:
hidden = random.choice([1, 2])
else:
hidden = int(hidden)
hole = Item(Value(COLORED_QUESTION_MARK))
self.hidden_one = None
visible_one = None
# We know we'll get an integer as "result" (in ?×...=result)
# so we round to integer to avoid trailing zeros (there are still some
# though seldom)
self.product = (self.nb1.evaluate() * self.nb2.evaluate())\
.rounded(Number('1')).printed
self.transduration = 9
if isinstance(self.nb2, Fraction):
self.hidden_one = self.nb2
visible_one = self.nb1
else:
L = [self.nb1, self.nb2]
random.shuffle(L)
self.hidden_one = L.pop()
visible_one = L.pop()
factors = [visible_one, hole]
if hidden == 1:
# TODO: better use a Product (when it's available in mathmakerlib)
self.holed_product = r' \times '.join([factors[1].printed,
factors[0].printed])
elif hidden == 2:
# TODO: better use a Product (when it's available in mathmakerlib)
self.holed_product = r' \times '.join([factors[0].printed,
factors[1].printed])
# self.holed_product.set_compact_display(False)
[docs] def q(self, **options):
self.substitutable_question_mark = True
m_expr = '{} = {}'.format(self.holed_product, self.product)
return _('{math_expr}') \
.format(math_expr=shared.machine.write_math_style2(m_expr))
[docs] def a(self, **options):
# This is actually meant for self.preset == 'mental calculation'
return shared.machine.write_math_style2(self.hidden_one.printed)
[docs] def js_a(self, **kwargs):
if isinstance(self.hidden_one, Fraction):
f = self.hidden_one.reduced().uiprinted
return [f, 'any_fraction == ' + f]
else:
return [self.hidden_one.uiprinted]