# -*- 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 Number
from mathmaker.lib.document.content import component
from mathmaker.lib.tools.wording import setup_wording_format_of
[docs]class sub_object(component.structure):
def __init__(self, build_data, **kwargs):
"""
The two numbers in build_data are the factors of the product.
The first number will be the possible divisor (i.e. questions will be:
"... is divisible by nb1. (True or false?)").
kwargs may contain a 'variant' parameter.
It can contain these values:
- 'random' (default), then it will randomly be replaced by 'true'
or 'false'
- 'true', then the answer will be true
- 'false', then a non zero remainder will be added:
result = nb1 × nb2 + remainder
and the answer will be false
:param build_data: a tuple of 2 numbers
:type build_data: tuple
"""
super().setup('minimal', **kwargs)
super().setup('division', nb=build_data, order='divisor,quotient',
**kwargs)
variant = kwargs.get('variant', 'random')
variant2 = kwargs.get('variant2', 'default')
if variant == 'random':
variant = random.choice(['true', 'false'])
self.n1 = self.divisor
if variant == 'true':
self.answer = _('True')
self.n2 = self.dividend
if (self.n1 == 4
and variant2 == 'ensure_no_confusion_between_rules'):
if Number(self.n2).digits_sum() % 4 == 0:
self.n2 += 100
else:
self.answer = _('False')
remainder = random.randint(1, self.divisor - 1)
correction = 0
if variant2 == 'ensure_no_confusion_between_rules':
if self.n1 == 3:
if ((self.dividend - 1) % 100) % 3 == 0:
remainder = -1
else:
remainder = 1
elif self.n1 == 9:
remainder = 9 - (self.dividend % 100) % 9
elif self.n1 == 4:
remainder = 2
mod4 = Number(self.dividend + remainder).digits_sum() % 4
if mod4 != 0:
if Number(self.dividend + remainder).digit(100) < 7:
correction = 100 * (4 - mod4)
else:
correction = -100 * mod4
self.n2 = self.dividend + remainder + correction
statement = _('{n2} is divisible by {n1}.')
nl = r'\newline' if self.slideshow else ''
self.wording = r'{} {} {}'.format(statement, nl,
_('(True or false?)'))
setup_wording_format_of(self)
self.transduration = 21
[docs] def q(self, **kwargs):
return self.wording.format(**self.wording_format)
[docs] def a(self, **kwargs):
# This is actually meant for self.preset == 'mental calculation'
return str(self.answer)
[docs] def js_a(self, **kwargs):
return [self.answer, self.answer.lower(),
self.answer[0], self.answer[0].lower()]