def process_requested_options(self, requested_options):
"""Convert requested options to usable types.
Args:
requested_options: QueryDict of requested_options (QueryDict).
Method does the following:
- Update all values through str_to_bool utility function.
- Raises 404 error is requested option cannot be found.
- Raises 404 is option given with invalid value.
Returns:
QueryDict of converted requested options (QueryDict).
"""
requested_options = requested_options.copy()
for option in self.valid_options.keys():
values = requested_options.getlist(option)
if not values:
raise QueryParameterMissingError(option)
for (i, value) in enumerate(values):
update_value = str_to_bool(value)
if update_value not in self.valid_options[option]:
raise QueryParameterInvalidError(option, value)
values[i] = update_value
requested_options.setlist(option, values)
return requested_options
def data(self):
"""Create a image for Piano Keys resource.
Returns:
A list of dictionaries for each resource page.
"""
label_type = self.options["label"].value
image_path = "static/img/resources/piano-keys/keyboard.png"
image = Image.open(image_path)
if str_to_bool(label_type):
self.label_keys(image, label_type)
image = image.rotate(90, expand=True)
return {"type": "image", "data": image}
def retrieve_query_parameter(request, parameter, valid_options=None):
"""Retrieve the query parameter.
If the parameter cannot be found, or is not found in the list of
valid options, then a 404 error is raised.
Args:
request: Request object (Request).
parameter: Parameter to retrieve (str).
valid_options: If provided, a list of valid options (list of str).
Returns:
String value of parameter.
"""
value = request.get(parameter, None)
if value is None:
raise Http404("{} parameter not specified.".format(parameter))
value = str_to_bool(value)
if valid_options and value not in valid_options:
raise Http404("{} parameter not valid.".format(parameter))
return value
def test_true(self):
self.assertTrue(str_to_bool("True"))
def test_other_value(self):
self.assertEqual(str_to_bool("example"), "example")
def test_no(self):
self.assertFalse(str_to_bool("no"))
def test_yes(self):
self.assertTrue(str_to_bool("yes"))
def test_false(self):
self.assertFalse(str_to_bool("False"))