class QuestionCategory(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(100))
questions = db.relationship(
'Question',
backref='category',
lazy='dynamic',
)
def __repr__(self):
return self.name
class Exercise(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(100), unique=True, nullable=False)
open_date = db.Column(db.DateTime, nullable=False)
close_date = db.Column(db.DateTime, nullable=False)
active = db.Column(db.Boolean, default=True)
questions = db.relationship(
'Question',
secondary = question_exercise,
backref = db.backref('exercises', lazy='dynamic'),
)
def __repr__(self):
return self.name
class UnitCategory(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(100), unique=True, nullable=False)
# SI base units
m = db.Column(db.Integer)
kg = db.Column(db.Integer)
s = db.Column(db.Integer)
A = db.Column(db.Integer)
K = db.Column(db.Integer)
mol = db.Column(db.Integer)
cd = db.Column(db.Integer)
variations = db.relationship(
'Unit',
backref='category',
lazy='dynamic')
def __repr__(self):
return self.name
def __init__(self, name='',
m=0, kg=0, s=0, A=0, K=0, mol=0, cd=0
):
self.name = name
self.m = m
self.kg = kg
self.s = s
self.A = A
self.K = K
self.mol = mol
self.cd = cd
self._value = np.array([m, kg, s, A, K, mol, cd])
def _get_value(self):
if not hasattr(self, '_value'):
self._value = np.array([
self.m,
self.kg,
self.s,
self.A,
self.K,
self.mol,
self.cd,
])
return self
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
fullname = db.Column(db.String(30))
email = db.Column(db.String(50), unique=True)
username = db.Column(db.String(25), unique=True)
password = db.Column(db.String(100))
password_tmp = db.Column(db.String(25))
validation_code = db.Column(db.String(10))
validated = db.Column(db.Boolean)
is_admin = db.Column(db.Boolean)
random_seed = db.Column(db.Integer)
def __init__(self,
fullname='',
email='',
username='',
password='',
is_admin='',
validated='',
validation_code=None,
password_tmp=''):
self.fullname = fullname
self.email = email
self.username = username
self.password = password
self.password_tmp = password_tmp
self.is_admin = is_admin
self.random_seed = randint(1, 10000)
if validation_code is None:
self.validation_code = ''.join(choice(alphanum) \
for _ in range(6))
else:
self.validation_code = validation_code
if validated:
self.validated = True
else:
self.validated = False
def __repr__(self):
return self.fullname
class Unit(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(50), unique=True, nullable=False)
fullname = db.Column(db.String(100), nullable=False)
face = db.Column(db.String(100))
SI_value = db.Column(db.Float)
category_id = db.Column(
db.Integer,
db.ForeignKey('unit_category.id'),
nullable=False)
active_variables = db.relationship(
'Variable',
secondary = variable_units,
backref = db.backref('units', lazy='dynamic')
)
def __init__(self,
name='', fullname='', face='', SI_value=1., category=None
):
self.fullname = fullname
self.name = name
if not face:
face = name
self.face = face
self.SI_value = SI_value
if isinstance(category, UnitCategory):
self.category = category
else:
try:
category_type = UnitCategory.query.filter_by(
name = category,
).first()
if category_type:
self.category = category_type
except:
self.category = None
def __repr__(self):
return "%s (%s)" % (self.name, self.category.name)
def _copy(self):
new = Unit(
fullname = self.fullname,
name = self.name,
face = self.face,
SI_value = self.SI_value,
category = self.category
)
new._value = self._value
return new
def from_SI(self, value):
return float(value) / float(self.SI_value)
def get_face(self):
return "%s (%s)" % (self.fullname, self.face)
def value(self):
self._get_value()
return float(self._value) * float(self.SI_value)
def face_value(self):
self._get_value()
return float(self._value)
def to(self, other):
assert type(self) is type(other)
self._get_value()
other._get_value()
out = deepcopy(other)
if self.name != other.name:
out._value = self._value * convert(self, other)
return out
def _get_value(self):
try:
self.category._get_value()
except:
pass
if not hasattr(self, '_value'):
self._value = 1.
return self
def _add_sub(self, other, operation):
assert type(self) is type(other)
assert self.category.name == other.category.name
self._get_value()
other._get_value()
out = self._copy
if operation == '+':
out._value = out._value + convert(other, out)
elif operation == '-':
out._value = out._value - convert(other, out)
return out
def _mul_div(self, other, operation):
self._get_value()
out = self._copy()
if isinstance(other, Number):
out._value = other * out._value
new_unit = out
elif type(out) is type(other):
other._get_value()
new_unit_type = out.category.name + operation + other.category.name
new_unit_name = out.name + operation + other.name
if operation == '*':
new_base = out.category._value + other.category._value
SI_value = out.SI_value * other.SI_value
_value = out._value * other._value
elif operation == '/':
new_base = out.category._value - other.category._value
SI_value = out.SI_value / float(other.SI_value)
_value = out._value / float(other._value)
new_unit_category = UnitCategory(
new_unit_type,
*new_base.tolist()
)
new_unit = Unit(
name = new_unit_name,
category = new_unit_category
)
new_unit.SI_value = SI_value
new_unit._value = _value
else:
raise TypeError
return new_unit
def __add__(self, other):
return self._add_sub(other, '+')
def __radd__(self, other):
return self._add_sub(other, '+')
def __sub__(self, other):
return self._add_sub(other, '-')
def __rsub__(self, other):
return self._add_sub(other, '-')
def __mul__(self, other):
return self._mul_div(other, '*')
def __rmul__(self, other):
return self._mul_div(other, '*')
def __div__(self, other):
return self._mul_div(other, '/')
def __rdiv__(self, other):
return self._mul_div(other, '/')
def SI_face(self):
self._get_value()
key = ['m', 'kg', 's', 'A', 'K', 'mol', 'cd']
out = r'% 5.2E $\times$' % (self._value * self.SI_value)
for i in range(len(key)):
if self.category._value[i] != 0:
p = self.category._value[i]
if p != 1:
out = out + r' %s$^{%s}$' % (key[i], p)
else:
out = out + r' %s' % key[i]
return out
class Question(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(100), nullable=False)
body = db.Column(db.Text, nullable=False)
answer_command = db.Column(db.Text)
no_answer = db.Column(db.Boolean, default=False)
# relationship with question
category_id = db.Column(
db.Integer,
db.ForeignKey('question_category.id'))
text_variables = db.relationship(
'Variable',
backref = 'question',
primaryjoin = 'Question.id==Variable.question_id',
lazy='dynamic')
answer_units = db.relationship(
'Unit',
secondary = question_unit_text,
backref = db.backref('answer_questions', lazy='dynamic')
)
correct_variable_id = db.Column(db.Integer,
db.ForeignKey('variable.id'))
correct_variable = db.relationship(
Variable,
backref = db.backref('correct_question', order_by=id),
foreign_keys=correct_variable_id)
wrong_variable_id = db.Column(db.Integer,
db.ForeignKey('variable.id'))
wrong_variable = db.relationship(
Variable,
backref = db.backref('wrong_question', order_by=id),
foreign_keys=wrong_variable_id)
def __init__(self, name='', body='', answer_command='',
category_id = None, text_variables=[], correct_variable_id = None,
correct_variable = None, wrong_variable_id = None,
wrong_variable = None, answer_units=[],
):
self.name = name
self.body = body
self.answer_command = answer_command
self.category_id = category_id
if len(text_variables) > 0 and type(text_variables[0]) is str:
variable_list = []
for i in range(len(text_variables)):
var = Variable.query.filter_by(
name = text_variables[i]
).first()
variable_list.append(var)
self.text_variables = variable_list
else:
self.text_variables = text_variables
self.correct_variable_id = correct_variable_id
if type(correct_variable) is str:
var = Variable.query.filter_by(
name = correct_variable
).first()
self.correct_variable = var
else:
self.correct_variable = correct_variable
self.wrong_variable_id = wrong_variable_id
if type(wrong_variable) is str:
var = Variable.query.filter_by(
name = wrong_variable
).first()
self.wrong_variable = var
else:
self.wrong_variable = wrong_variable
self.answer_units = answer_units
def __repr__(self):
if self.category:
return "%s %s" % (self.category.name, self.name)
else:
return self.name
def render(self, seed, options=5):
seed = seed + self.id
rs = np.random.RandomState(seed)
text = self.body
for i in range(len(self.text_variables.all())):
var = self.text_variables[i]
pattern = '_' + var.name + '_'
text = text.replace(pattern,
str(var.render(seed+i)))
if self.answer_units:
unit_rs = np.random.RandomState(seed+1)
unit = unit_rs.choice(self.answer_units)
pattern = '_unit_'
face = unit.get_face()
text = text.replace(pattern, face)
option_list = []
if self.correct_variable and self.wrong_variable:
option_list = []
correct_list = rs.permutation(
self.correct_variable.get_list()
).tolist()
wrong_list = rs.permutation(
self.wrong_variable.get_list()
).tolist()
ind = rs.randint(0, len(correct_list))
option_list.append(correct_list.pop(ind))
correct_list.extend(wrong_list)
option_list.extend(
rs.permutation(correct_list)[:options - 1]
)
return text, rs.permutation(option_list)
def evaluate(self, seed):
qseed = seed + self.id
rs = np.random.RandomState(qseed)
if self.answer_command:
answer = self.answer_command
for i in range(len(self.text_variables.all())):
var = self.text_variables[i]
name = '_' + var.name + '_'
answer = answer.replace(name, str(var.value(qseed+i)))
SI_answer = float(parse_expr(answer))
if self.answer_units:
unit_rs = np.random.RandomState(qseed+1)
unit = unit_rs.choice(self.answer_units)
SI_answer = unit.from_SI(SI_answer)
return SI_answer
else:
answer_list = []
option_list = self.render(seed)[1]
for i in range(len(option_list)):
if option_list[i] in self.correct_variable.get_list():
answer_list.append(i)
return answer_list
class Variable(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(50), nullable=False)
description = db.Column(db.Text, nullable=False)
category = db.Column(db.String(50), nullable=False)
question_id = db.Column(
db.Integer,
db.ForeignKey('question.id'))
# constraints, one of the three below
# tuple string: '(min, max)'
# list string: '[value1, value2, value3]'
# dict string for dependent variable value:
# "{'val1_var1': [value1, value2, value3],
# 'val2_var1: (min, max)'
constraint = db.Column(db.Text)
def __init__(self,
name = '',
description = '',
category = '',
constraint = '',
units = '',
):
self.name = name
self.description = description
self.category = category
self.constraint = constraint
self.units = units
def __repr__(self):
base = "%s %s" % (self.name, self.category)
if self.question is not None\
or len(self.correct_question) > 0\
or len(self.wrong_question) > 0:
return base + " (used)"
else:
return base + " (available)"
def draw(self, seed):
rs = np.random.RandomState(seed)
if self.constraint:
c = ast.literal_eval(self.constraint)
else:
c = []
if self.category == 'float':
if type(c) is tuple:
if len(c) == 2:
value = rs.rand() * (c[1] - c[0]) + c[0]
elif len(c) == 3:
value = rs.choice(np.arange(*c))
else:
raise TypeError
elif type(c) is list:
if len(c) > 0:
value = rs.choice(c)
else:
raise TypeError
elif type(c) is dict:
raise TypeError
return value
elif self.category == 'int':
if type(c) is tuple:
value = rs.choice(range(*c))
elif type(c) is list:
value = rs.choice(c)
elif type(c) is dict:
raise TypeError
return value
elif self.category == 'str':
assert type(c) is list
return rs.choice(c)
elif self.category == 'unit':
unit = rs.choice(self.units.all())
return unit.SI_value
else:
raise TypeError
def value(self, seed=None):
rs = np.random.RandomState(seed)
value = self.draw(seed)
if self.category == 'float' and len(self.units.all()) > 0:
unit = rs.choice(self.units.all())
value = value * unit.SI_value
return value
def render(self, seed = None):
rs = np.random.RandomState(seed)
if self.category != 'unit':
value = self.draw(seed)
if 100 > value and value >= 1:
value = "%.2f" % value
elif 1 > value and value >= 0.1:
value = "%.4f" % value
else:
value = "%9.3E" % value
if hasattr(self, 'units') and len(self.units.all()) > 0:
unit = rs.choice(self.units.all())
value = value + " %s" % unit.name
return value
else:
unit = rs.choice(self.units.all())
value = unit.get_face()
return value
def get_list(self):
assert hasattr(self, 'constraint')
c = ast.literal_eval(self.constraint)
assert type(c) is list
return c