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if not isinstance(item, tuple) or len(item) != 2: raise ValueError('Linked items must be instance/prop-name tuple') if not isinstance(item[0], tuple(LINK_OBSERVERS)): raise ValueError('Only {} instances may be linked'.format( ', '.join([link_cls.__name__ ...
def _validate(item)
Validate (instance, prop name) tuple
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2.877012
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if not isinstance(value, (tuple, list, np.ndarray)): self.error(instance, value) if self.coerce: value = self.wrapper(value) valid_class = ( self.wrapper if isinstance(self.wrapper, type) else np.ndarray ) if not isinstance(value, vali...
def validate(self, instance, value)
Determine if array is valid based on shape and dtype
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2.794884
1.05405
error_class = error_class or ValidationError if not isinstance(value, (list, tuple, np.ndarray)): super(Array, self).error(instance, value, error_class, extra) if isinstance(value, (list, tuple)): val_description = 'A {typ} of length {len}'.format( ...
def error(self, instance, value, error_class=None, extra='')
Generates a ValueError on setting property to an invalid value
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2.559103
1.012838
kwargs.update({'trusted': kwargs.get('trusted', False)}) if self.deserializer is not None: return self.deserializer(value, **kwargs) if value is None: return None return self.wrapper(value).astype(self.dtype[0])
def deserialize(self, value, **kwargs)
De-serialize the property value from JSON If no deserializer has been registered, this converts the value to the wrapper class with given dtype.
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1.165438
def _recurse_list(val): if val and isinstance(val[0], list): return [_recurse_list(v) for v in val] return [str(v) if np.isnan(v) or np.isinf(v) else v for v in val] return _recurse_list(value.tolist())
def to_json(value, **kwargs)
Convert array to JSON list nan values are converted to string 'nan', inf values to 'inf'.
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value = super(BaseVector, self).validate(instance, value) if self.length is not None: try: value.length = self._length_array(value) except ZeroDivisionError: self.error( instance, value, error_clas...
def validate(self, instance, value)
Check shape and dtype of vector and scales it to given length
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5.567027
1.122469
if isinstance(value, string_types): if ( value.upper() not in VECTOR_DIRECTIONS or value.upper() in ('Z', '-Z', 'UP', 'DOWN') ): self.error(instance, value) value = VECTOR_DIRECTIONS[value.upper()][:2] ...
def validate(self, instance, value)
Check shape and dtype of vector validate also coerces the vector from valid strings (these include ZERO, X, Y, -X, -Y, EAST, WEST, NORTH, and SOUTH) and scales it to the given length.
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3.39082
1.216267
if not isinstance(value, (tuple, list, np.ndarray)): self.error(instance, value) if isinstance(value, (tuple, list)): for i, val in enumerate(value): if isinstance(val, string_types): if val.upper() not in VECTOR_DIRECTIONS: ...
def validate(self, instance, value)
Check shape and dtype of vector validate also coerces the vector from valid strings (these include ZERO, X, Y, Z, -X, -Y, -Z, EAST, WEST, NORTH, SOUTH, UP, and DOWN) and scales it to the given length.
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1.122859
if self.data is None: return "" if isinstance(self.data, dict): firstpart = lng.split('-')[0] similar = [l for l in self.data.keys() if (l.startswith(firstpart + "-") or firstpart == l) and l != lng] if self.data.get(lng): return ...
def localize(self, lng: str) -> str
Evaluate the given string with respect to the locale defined by ``lng``. If no string is available in the currently active language, this will give you the string in the system's default language. If this is unavailable as well, it will give you the string in the first language available. ...
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if obs.names is everything: names = list(instance._props) else: names = obs.names for name in names: if name not in instance._listeners: instance._listeners[name] = {typ: [] for typ in LISTENER_TYPES} instance._listeners[name][obs.mode] += [obs]
def _set_listener(instance, obs)
Add listeners to a HasProperties instance
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if ( change['mode'] not in listeners_disabled._quarantine and #pylint: disable=protected-access change['name'] in instance._listeners ): return instance._listeners[change['name']][change['mode']] return []
def _get_listeners(instance, change)
Gets listeners of changed Property on a HasProperties instance
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mode = 'observe_change' if change_only else 'observe_set' if names is None and func is None: return Observer(names_or_instance, mode) obs = Observer(names, mode)(func) _set_listener(names_or_instance, obs) return obs
def observer(names_or_instance, names=None, func=None, change_only=False)
Specify a callback function that will fire on Property value change Observer functions on a HasProperties class fire after the observed Property or Properties have been changed (unlike validator functions that fire on set before the value is changed). You can use this method as a decorator inside a Ha...
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if names is None and func is None: if callable(names_or_instance): return ClassValidator(names_or_instance) return Observer(names_or_instance, 'validate') val = Observer(names, 'validate')(func) _set_listener(names_or_instance, val) return val
def validator(names_or_instance, names=None, func=None)
Specify a callback function to fire on class validation OR property set This function has two modes of operation: 1. Registering callback functions that validate Property values when they are set, before the change is saved to the HasProperties instance. This mode is very similar to the :code:`o...
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output = OrderedDict() output_keys = set() all_bases = [] # Go through the bases from furthest to nearest ancestor for base in reversed(bases): # Only keep the items that are still defined on the bases if base is not object and isinstance(base, PropertyMetaclass): ou...
def build_from_bases(bases, classdict, attr, attr_dict)
Helper function to build private HasProperties attributes
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if ( not isinstance(value_a, HasProperties) or not isinstance(value_b, HasProperties) ): return value_a == value_b if getattr(value_a, '_testing_equality', False): return False value_a._testing_equality = True #pylint...
def equal(value_a, value_b)
Determine if two **HasProperties** instances are equivalent Equivalence is determined by checking if (1) the two instances are the same class and (2) all Property values on two instances are equal, using :code:`Property.equal`. If the two values are the same HasProperties instance (eg. :code:`value_a i...
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if not isinstance(value, HasProperties): raise ValueError('properties.copy may only be used to copy' 'HasProperties instances') kwargs.update({'include_class': kwargs.get('include_class', True)}) kwargs.update({'trusted': kwargs.get('trusted', True)}) return value....
def copy(value, **kwargs)
Return a copy of a **HasProperties** instance A copy is produced by serializing the HasProperties instance then deserializing it to a new instance. Therefore, if any properties cannot be serialized/deserialized, :code:`copy` will fail. Any keyword arguments will be passed through to both :code:`seriali...
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if name is None: for key in self._props: if isinstance(self._props[key], basic.Property): self._reset(key) return if name not in self._props: raise AttributeError("Input name '{}' is not a known " ...
def _reset(self, name=None)
Revert specified property to default value If no property is specified, all properties are returned to default.
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if getattr(self, '_getting_validated', False): return True self._getting_validated = True self._validation_error_tuples = [] self._non_validation_error = None try: for val in itervalues(self._class_validators): try: ...
def validate(self)
Call all registered class validator methods These are all methods decorated with :code:`@properties.validator`. Validator methods are expected to raise a ValidationError if they fail.
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for key, prop in iteritems(self._props): try: value = self._get(key) err_msg = 'Invalid value for property {}: {}'.format(key, value) if value is not None: change = dict(name=key, previous=value, value=value, ...
def _validate_props(self)
Assert that all the properties are valid on validate()
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if getattr(self, '_getting_serialized', False): raise utils.SelfReferenceError('Object contains unserializable ' 'self reference') self._getting_serialized = True try: kwargs.update({ 'include_class': inc...
def serialize(self, include_class=True, save_dynamic=False, **kwargs)
Serializes a **HasProperties** instance to dictionary This uses the Property serializers to serialize all Property values to a JSON-compatible dictionary. Properties that are undefined are not included. If the **HasProperties** instance contains a reference to itself, a :code:`propertie...
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if not isinstance(value, dict): raise ValueError( 'HasProperties class {} must deserialize from dictionary, ' 'not input of type {}'.format( cls.__name__, value.__class__.__name__ ) ) output_cls = cls._d...
def deserialize(cls, value, trusted=False, strict=False, #pylint: disable=too-many-locals assert_valid=False, **kwargs)
Creates **HasProperties** instance from serialized dictionary This uses the Property deserializers to deserialize all JSON-compatible dictionary values into their corresponding Property values on a new instance of a **HasProperties** class. Extra keys in the dictionary that do not corre...
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if not input_cls_name or input_cls_name == cls.__name__: return cls if trusted and input_cls_name in cls._REGISTRY: return cls._REGISTRY[input_cls_name] if strict: raise ValueError( 'Class name {} from deserialization input dictionary ...
def _deserialize_class(cls, input_cls_name, trusted, strict)
Returns the HasProperties class to use for deserialization
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status = Instance('', TaskStatus).validate(None, status) print(r'{taskname} | {percent:>3}% | {message}'.format( taskname=self.__class__.__name__, percent=int(round(100*status.progress)), message=status.message if status.message else '', ))
def report_status(self, status)
Hook for reporting the task status towards completion
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registry = kwargs.pop('registry', None) if registry is None: registry = dict() if not registry: root = True registry.update({'__root__': self.uid}) else: root = False key = self.uid if key not in registry: ...
def serialize(self, include_class=True, save_dynamic=False, **kwargs)
Serialize nested HasUID instances to a flat dictionary **Parameters**: * **include_class** - If True (the default), the name of the class will also be saved to the serialized dictionary under key :code:`'__class__'` * **save_dynamic** - If True, dynamic properties are writt...
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registry = kwargs.pop('registry', None) if registry is None: if not isinstance(value, dict): raise ValueError('HasUID must deserialize from dictionary') registry = value.copy() uid = kwargs.get('root', registry.get('__root__')) else: ...
def deserialize(cls, value, trusted=False, strict=False, assert_valid=False, **kwargs)
Deserialize nested HasUID instance from flat pointer dictionary **Parameters** * **value** - Flat pointer dictionary produced by :code:`serialize` with UID/HasUID key/value pairs. It also includes a :code:`__root__` key to specify the root HasUID instance. * **trusted** - I...
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1.021321
kwargs.update({'trusted': kwargs.get('trusted', False)}) if self.deserializer is not None: return self.deserializer(value, **kwargs) if value is None: return None if isinstance(value, string_types): return value if issubclass(self.inst...
def deserialize(self, value, **kwargs)
Deserialize instance from JSON value If a deserializer is registered, that is used. Otherwise, if the instance_class is a HasProperties subclass, an instance can be deserialized from a dictionary.
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# Pass if already validated if getattr(value, '__valid__', False): return value # Validate that value is PNG if isinstance(value, png.Image): pass else: value = super(ImagePNG, self).validate(instance, value) try: ...
def validate(self, instance, value)
Checks if value is an open PNG file, valid filename, or png.Image Returns an open bytestream of the image
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b64rep = base64.b64encode(value.read()) value.seek(0) jsonrep = '{preamble}{b64}'.format( preamble=PNG_PREAMBLE, b64=b64rep.decode(), ) return jsonrep
def to_json(value, **kwargs)
Convert a PNG Image to base64-encoded JSON to_json assumes that value has passed validation.
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if not value.startswith(PNG_PREAMBLE): raise ValueError('Not a valid base64-encoded PNG image') infile = BytesIO() rep = base64.b64decode(value[len(PNG_PREAMBLE):].encode('utf-8')) infile.write(rep) infile.seek(0) return infile
def from_json(value, **kwargs)
Convert a PNG Image from base64-encoded JSON
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errors = schema.errors(value) if errors: error_details = '' for error in errors: if error.pointer: error_details += ' - %s: %s\n' % (error.pointer, error.message) else: error_details += ' - %s\n' % error.message raise Validat...
def validate(schema, value, noun='value')
Checks the value against the schema, and raises ValidationError if validation fails.
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def decorator(func): @wraps(func) def inner(*passed_args, **passed_kwargs): # Enforce no positional args # first argument of instance method and class method is always positonal so we need # to make expception for them. Static methods are still validated acco...
def validate_call(kwargs, returns, is_method=False)
Decorator which runs validation on a callable's arguments and its return value. Pass a schema for the kwargs and for the return value. Positional arguments are not supported.
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if error.pointer: error.pointer = '{}.{}'.format(pointer_or_prefix, error.pointer) else: error.pointer = '{}'.format(pointer_or_prefix) return error
def _update_error_pointer(error, pointer_or_prefix)
Helper function to update an Error's pointer attribute with a (potentially prefixed) dictionary key or list index.
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optional_keys = set(optional_keys or []) return Dictionary( contents=type(self.contents)( (k, v) for d in (self.contents, contents) for k, v in six.iteritems(d) ) if contents else self.contents, optional_keys=optional_keys if replace_optional_...
def extend( self, contents=None, optional_keys=None, allow_extra_keys=None, description=None, replace_optional_keys=False, )
This method allows you to create a new `Dictionary` that extends the current `Dictionary` with additional contents and/or optional keys, and/or replaces the `allow_extra_keys` and/or `description` attributes. :param contents: More contents, if any, to extend the current contents :type contents:...
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if value not in self.values: return [Error(self._error_message, code=ERROR_CODE_UNKNOWN)] return []
def errors(self, value)
Returns a list of errors with the value. An empty/None return means that it's valid.
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# NO Dump file selected -> DO NOTHING if self.running_config.output_file: # Determinate file format _, extension = op.splitext(self.running_config.output_file) extension = extension.replace(".", "") if extension not in self.ALLOWED_DUMP_FORMATS...
def dump(self)
Dump to file
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def _read_stdin() -> str: # Read input with 5 sec timeout while sys.stdin in select.select([sys.stdin], [], [], 2)[0]: line = sys.stdin.readline() if line: yield line else: # an empty line means stdin has been closed return ...
def get_data_from_sources(patton_config: PattonRunningConfig, dependency_or_banner: str = "dependency") \ -> List[str]
This function try to get data from different sources: - command line arguments - from external input file - from stdin Return a list with the content of all of collected data. A list element by each input data found. :param dependency_or_banner: allowed values are: ["dependency" | "banner"] ...
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result = set() for source_type, source_content in banners: if source_type == "file": result.update(nmap_file(source_content)) return result
def parse_banners(banners: List[List[str]], patton_config: PattonRunningConfig) -> Set
This function try to find the better function to parser input banners and parse it
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result = {} for source_type, source_content in dependencies: # Select parser parser = DEPENDENCIES_PARSERS[patton_config.source_type] if not source_content: continue if source_type == "cli_input": fixed_source = "\n".join(source_content) ...
def parse_dependencies(dependencies: List[List[str]], patton_config: PattonRunningConfig) -> Dict
This function try to find the better function to parser input banners and parse it
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def on_init(app): # pylint: disable=unused-argument docs_path = os.path.abspath(os.path.dirname(__file__)) root_path = os.path.abspath(os.path.join(docs_path, '..')) apidoc_path = 'sphinx-apidoc' swg2rst_path = 'swg2rst' if hasattr(sys, 'real_prefix'): # Check to see if we are in a virtualenv...
Run sphinx-apidoc and swg2rst after Sphinx initialization. Read the Docs won't run tox or custom shell commands, so we need this to avoid checking in the generated reStructuredText files.
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task_class = import_string(sender) except ImportError: return if issubclass(task_class.__class__, UserTaskMixin): arguments_dict = task_class.arguments_as_dict(*body['args'], **body['kwargs']) user_id = _get_user_id(arguments_dict) task_id = body['id'] if body.get...
def create_user_task(sender=None, body=None, **kwargs): # pylint: disable=unused-argument try
Create a :py:class:`UserTaskStatus` record for each :py:class:`UserTaskMixin`. Also creates a :py:class:`UserTaskStatus` for each chain, chord, or group containing the new :py:class:`UserTaskMixin`.
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LOGGER.debug(task_class) if issubclass(task_class.__class__, UserTaskMixin): arguments_dict = task_class.arguments_as_dict(*args, **kwargs) name = task_class.generate_name(arguments_dict) total_steps = task_class.calculate_total_steps(arguments_dict) parent_name = kwargs.get...
def _create_chain_entry(user_id, task_id, task_class, args, kwargs, callbacks, parent=None)
Create and update status records for a new :py:class:`UserTaskMixin` in a Celery chain.
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args = message_body['args'] kwargs = message_body['kwargs'] arguments_dict = task_class.arguments_as_dict(*args, **kwargs) name = task_class.generate_name(arguments_dict) total_steps = task_class.calculate_total_steps(arguments_dict) parent_name = kwargs.get('user_task_name', '') chord_...
def _create_chord_entry(task_id, task_class, message_body, user_id)
Create and update status records for a new :py:class:`UserTaskMixin` in a Celery chord.
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parent_id = message_body.get('taskset', None) if not parent_id: # Not part of a group return None parent_class = 'celery.group' parent_name = message_body['kwargs'].get('user_task_name', '') parent, _ = UserTaskStatus.objects.get_or_create( task_id=parent_id, defaults={'...
def _get_or_create_group_parent(message_body, user_id)
Determine if the given task belongs to a group or not, and if so, get or create a status record for the group. Arguments: message_body (dict): The body of the before_task_publish signal for the task in question user_id (int): The primary key of the user model record for the user who triggered the t...
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if 'user_id' not in arguments_dict: raise TypeError('Each invocation of a UserTaskMixin subclass must include the user_id') user_id = arguments_dict['user_id'] try: get_user_model().objects.get(pk=user_id) except (ValueError, get_user_model().DoesNotExist): raise TypeError('...
def _get_user_id(arguments_dict)
Get and validate the `user_id` argument to a task derived from `UserTaskMixin`. Arguments: arguments_dict (dict): The parsed positional and keyword arguments to the task Returns ------- int: The primary key of a user record (may not be an int if using a custom user model)
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if isinstance(sender, UserTaskMixin): exception = kwargs['exception'] if not isinstance(exception, TaskCanceledException): # Don't include traceback, since this is intended for end users sender.status.fail(str(exception)) user_task_stopped.send_robust(sender=User...
def task_failed(sender=None, **kwargs)
Update the status record accordingly when a :py:class:`UserTaskMixin` fails.
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status = sender.status # Failed tasks with good exception handling did not succeed just because they ended cleanly if status.state not in (UserTaskStatus.CANCELED, UserTaskStatus.FAILED, UserTaskStatus.RETRYING): status.succeed() user_task_stopped.send_robust(sender=UserTaskS...
def task_succeeded(sender=None, **kwargs): # pylint: disable=unused-argument if isinstance(sender, UserTaskMixin)
Update the status record accordingly when a :py:class:`UserTaskMixin` finishes successfully.
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hcolors = np.array([rgb2hcl(*i[:3]) for i in colors]) # unwrap colormap in hcl space hcolors[:, 0] = np.rad2deg(np.unwrap(np.deg2rad(np.array(hcolors)[:, 0]))) channels = [np.interp(arr, np.array(values), np.array(hcolors)[:, i]) f...
def colorize(arr, colors, values)
Colorize a monochromatic array *arr*, based *colors* given for *values*. Interpolation is used. *values* must be in ascending order.
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new_arr = np.digitize(arr.ravel(), np.concatenate((values, [max(np.nanmax(arr), values.max()) + 1]))) new_arr -= 1 new_arr = new_arr.clip(min=0, max=len(values) - 1) try: new_a...
def palettize(arr, colors, values)
From start *values* apply *colors* to *data*.
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cbar = np.tile(np.arange(length) * 1.0 / (length - 1), (height, 1)) cbar = (cbar * (colormap.values.max() - colormap.values.min()) + colormap.values.min()) return colormap.colorize(cbar)
def colorbar(height, length, colormap)
Return the channels of a colorbar.
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cbar = np.tile(np.arange(length) * 1.0 / (length - 1), (height, 1)) cbar = (cbar * (colormap.values.max() + 1 - colormap.values.min()) + colormap.values.min()) return colormap.palettize(cbar)
def palettebar(height, length, colormap)
Return the channels of a palettebar.
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if min_val > max_val: max_val, min_val = min_val, max_val self.values = (((self.values * 1.0 - self.values.min()) / (self.values.max() - self.values.min())) * (max_val - min_val) + min_val)
def set_range(self, min_val, max_val)
Set the range of the colormap to [*min_val*, *max_val*]
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self.colors = (((self.colors * 1.0 - self.colors.min()) / (self.colors.max() - self.colors.min())) * 255) return dict(zip(self.values, tuple(map(tuple, self.colors))))
def to_rio(self)
Converts the colormap to a rasterio colormap.
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def cancel(self, request, *args, **kwargs): # pylint: disable=unused-argument status = self.get_object() status.cancel() serializer = StatusSerializer(status, context={'request': request}) return Response(serializer.data)
Cancel the task associated with the specified status record. Arguments: request (Request): A POST including a task status record ID Returns ------- Response: A JSON response indicating whether the cancellation succeeded or not
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def swagger(request): # pylint: disable=unused-argument generator = schemas.SchemaGenerator(title='django-user-tasks REST API') return response.Response(generator.get_schema())
Render Swagger UI and the underlying Open API schema JSON file.
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if 'SWAGGER_JSON_PATH' in os.environ: with io.open(os.environ['SWAGGER_JSON_PATH'], 'rb') as f: return f.read() else: return super(ConditionalOpenAPIRenderer, self).render(data, accepted_media_type, renderer_context)
def render(self, data, accepted_media_type=None, renderer_context=None)
Render the appropriate Open API JSON file.
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rules.add_perm('user_tasks.view_usertaskstatus', STATUS_PERMISSION) rules.add_perm('user_tasks.cancel_usertaskstatus', STATUS_PERMISSION) rules.add_perm('user_tasks.change_usertaskstatus', rules.predicates.is_superuser) rules.add_perm('user_tasks.delete_usertaskstatus', STATUS_PERMISSION) rules...
def add_rules()
Use the rules provided in this module to implement authorization checks for the ``django-user-tasks`` models. These rules allow only superusers and the user who triggered a task to view its status or artifacts, cancel the task, or delete the status information and all its related artifacts. Only superusers ar...
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1.151844
if request.user.is_superuser: return queryset return queryset.filter(status__user=request.user)
def filter_queryset(self, request, queryset, view)
Filter out any artifacts which the requesting user does not have permission to view.
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1.18391
''' _text_to_rgb takes as input a string composed by 3 values in the range [0,255] and returns a tuple of integers. If the parameters cat and tot are given, the function generates a transparency value for this color and returns a tuple of length 4. tot is the total number of colors in the colorm...
def _text_to_rgb(value,norm=False,cat=1, tot=1,offset=0.5,hex=False)
_text_to_rgb takes as input a string composed by 3 values in the range [0,255] and returns a tuple of integers. If the parameters cat and tot are given, the function generates a transparency value for this color and returns a tuple of length 4. tot is the total number of colors in the colormap cat i...
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''' _make_cmap takes a list of tuples which contain RGB values. The RGB values may either be in 8-bit [0 to 255] (in which bit must be set to True when called) or arithmetic [0 to 1] (default). _make_cmap returns a cmap with equally spaced colors. Arrange your tuples so that the first color is t...
def _make_cmap(colors, position=None, bit=False)
_make_cmap takes a list of tuples which contain RGB values. The RGB values may either be in 8-bit [0 to 255] (in which bit must be set to True when called) or arithmetic [0 to 1] (default). _make_cmap returns a cmap with equally spaced colors. Arrange your tuples so that the first color is the lowest va...
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''' cmap_from_text takes as input a file that contains a colormap in text format composed by lines with 3 values in the range [0,255] or [00,FF] and returns a tuple of integers. If the parameters cat and tot are given, the function generates a transparency value for this color and returns a tuple ...
def cmap_from_text(filename, norm=False, transparency=False, hex=False)
cmap_from_text takes as input a file that contains a colormap in text format composed by lines with 3 values in the range [0,255] or [00,FF] and returns a tuple of integers. If the parameters cat and tot are given, the function generates a transparency value for this color and returns a tuple of length ...
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''' Utility function that converts an image file in 3 np arrays that can be fed into geo_image.GeoImage in order to generate a PyTROLL GeoImage object. ''' im = Pimage.open(filepath).convert('RGB') (width, height) = im.size _r = np.array(list(im.getdata(0)))/255.0 _g = np.array(list(...
def _image2array(filepath)
Utility function that converts an image file in 3 np arrays that can be fed into geo_image.GeoImage in order to generate a PyTROLL GeoImage object.
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cases = {"jpg": "jpeg", "jpeg": "jpeg", "tif": "tiff", "tiff": "tif", "pgm": "ppm", "pbm": "ppm", "ppm": "ppm", "bmp": "bmp", "dib": "bmp", "gif": "gif", "im": "im", "p...
def check_image_format(fformat)
Check that *fformat* is valid
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return (isinstance(item, (list, tuple, set)) and len(item) == 2 and not isinstance(item[0], (list, tuple, set)) and not isinstance(item[1], (list, tuple, set)))
def _is_pair(item)
Check if an item is a pair (tuple of size 2).
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kb_ = 0.114 kr_ = 0.299 r__ = 2 * cr_ / (1 - kr_) + y__ b__ = 2 * cb_ / (1 - kb_) + y__ g__ = (y__ - kr_ * r__ - kb_ * b__) / (1 - kr_ - kb_) return r__, g__, b__
def ycbcr2rgb(y__, cb_, cr_)
Convert the three YCbCr channels to RGB channels.
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if isinstance(chn, np.ma.core.MaskedArray): chn_data = chn.data chn_mask = chn.mask else: chn_data = np.array(chn) chn_mask = False scaled = ((chn_data - color_min) * 1.0 / (color_max - color_min)) self.channels.a...
def _add_channel(self, chn, color_min, color_max)
Adds a channel to the image object
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channels = [] if self.mode == "P": self.convert("RGB") if self.mode == "PA": self.convert("RGBA") for chn in self.channels: if isinstance(chn, np.ma.core.MaskedArray): final_data = chn.data.clip(0, 1) * np.iinfo(dtype).max ...
def _finalize(self, dtype=np.uint8)
Finalize the image, that is put it in RGB mode, and set the channels in unsigned 8bit format ([0,255] range) (if the *dtype* doesn't say otherwise).
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if(((self.channels == []) and (not self.shape == (0, 0))) or ((not self.channels == []) and (self.shape == (0, 0)))): raise RuntimeError("Channels-shape mismatch.") return self.channels == [] and self.shape == (0, 0)
def is_empty(self)
Checks for an empty image.
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self.pil_save(filename, compression, fformat, thumbnail_name, thumbnail_size)
def save(self, filename, compression=6, fformat=None, thumbnail_name=None, thumbnail_size=None)
Save the image to the given *filename*. For some formats like jpg and png, the work is delegated to :meth:`pil_save`, which doesn't support the *compression* option.
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# PIL does not support compression option. del compression if self.is_empty(): raise IOError("Cannot save an empty image") if isinstance(filename, (str, six.text_type)): ensure_dir(filename) fformat = fformat or os.path.splitext(filename)[1][1:...
def pil_save(self, filename, compression=6, fformat=None, thumbnail_name=None, thumbnail_size=None)
Save the image to the given *filename* using PIL. For now, the compression level [0-9] is ignored, due to PIL's lack of support. See also :meth:`save`.
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reserved = ('interlace', 'gamma', 'dpi', 'transparency', 'aspect') try: tags = self.tags except AttributeError: tags = {} # Undocumented class from PIL import PngImagePlugin meta = PngImagePlugin.PngInfo() # Copy from tags to ne...
def _pngmeta(self)
It will return GeoImage.tags as a PNG metadata object. Inspired by: public domain, Nick Galbreath http://blog.modp.com/2007/08/python-pil-and-png-metadata-take-2.html
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alpha = np.ma.array(alpha) if(not (alpha.shape[0] == 0 and self.shape[0] == 0) and alpha.shape != self.shape): raise ValueError("Alpha channel shape should match image shape") if not self.mode.endswith("A"): self.convert(self.mode + "A...
def putalpha(self, alpha)
Adds an *alpha* channel to the current image, or replaces it with *alpha* if it already exists.
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self._check_modes(("RGB", "RGBA")) (self.channels[0], self.channels[1], self.channels[2]) = \ rgb2ycbcr(self.channels[0], self.channels[1], self.channels[2]) if self.fill_value is not None: self.fill_value[0:3] = rgb...
def _rgb2ycbcr(self, mode)
Convert the image from RGB mode to YCbCr.
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self._check_modes(("YCbCr", "YCbCrA")) (self.channels[0], self.channels[1], self.channels[2]) = \ ycbcr2rgb(self.channels[0], self.channels[1], self.channels[2]) if self.fill_value is not None: self.fill_value[0:3] =...
def _ycbcr2rgb(self, mode)
Convert the image from YCbCr mode to RGB.
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if self.mode.endswith("A"): chans = self.channels[:-1] alpha = self.channels[-1] self._secondary_mode = self.mode[:-1] else: chans = self.channels alpha = None self._secondary_mode = self.mode palette = [] ...
def _to_p(self, mode)
Convert the image to P or PA mode.
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self._check_modes(("P", "PA")) if self.mode.endswith("A"): alpha = self.channels[-1] else: alpha = None chans = [] cdfs = [] color_chan = self.channels[0] for i in range(len(self.palette[0])): cdfs.append(np.zeros(...
def _from_p(self, mode)
Convert the image from P or PA mode.
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self._check_modes(("L", "LA")) self.channels.append(self.channels[0].copy()) self.channels.append(self.channels[0].copy()) if self.fill_value is not None: self.fill_value = self.fill_value[:1] * 3 + self.fill_value[1:] if self.mode == "LA": self.c...
def _l2rgb(self, mode)
Convert from L (black and white) to RGB.
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self._check_modes(("RGB", "RGBA")) kb_ = 0.114 kr_ = 0.299 r__ = self.channels[0] g__ = self.channels[1] b__ = self.channels[2] y__ = kr_ * r__ + (1 - kr_ - kb_) * g__ + kb_ * b__ if self.fill_value is not None: self.fill_value = (...
def _rgb2l(self, mode)
Convert from RGB to monochrome L.
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self._check_modes(("YCbCr", "YCbCrA")) self.channels = [self.channels[0]] + self.channels[3:] if self.fill_value is not None: self.fill_value = [self.fill_value[0]] + self.fill_value[3:] self.mode = mode
def _ycbcr2l(self, mode)
Convert from YCbCr to L.
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self._check_modes(("L", "LA")) luma = self.channels[0] zeros = np.ma.zeros(luma.shape) zeros.mask = luma.mask self.channels = [luma, zeros, zeros] + self.channels[1:] if self.fill_value is not None: self.fill_value = [self.fill_value[0], 0, 0] + se...
def _l2ycbcr(self, mode)
Convert from L to YCbCr.
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if mode == self.mode: return if mode not in ["L", "LA", "RGB", "RGBA", "YCbCr", "YCbCrA", "P", "PA"]: raise ValueError("Mode %s not recognized." % (mode)) if self.is_empty(): self.mode = mode return if mo...
def convert(self, mode)
Convert the current image to the given *mode*. See :class:`Image` for a list of available modes.
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if not isinstance(channels, (tuple, list)): channels = [channels] * len(self.channels) for i in range(len(self.channels)): if channels[i]: self.channels[i] = np.ma.clip(self.channels[i], 0.0, 1.0)
def clip(self, channels=True)
Limit the values of the array to the default [0,1] range. *channels* says which channels should be clipped.
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if self.is_empty(): raise ValueError("Cannot resize an empty image") factor = [1, 1] zoom = [True, True] zoom[0] = shape[0] >= self.height zoom[1] = shape[1] >= self.width if zoom[0]: factor[0] = shape[0] * 1.0 / self.height else...
def resize(self, shape)
Resize the image to the given *shape* tuple, in place. For zooming, nearest neighbour method is used, while for shrinking, decimation is used. Therefore, *shape* must be a multiple or a divisor of the image shape.
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if self.is_empty(): return if luminance.shape != self.channels[0].shape: if ((luminance.shape[0] * 1.0 / luminance.shape[1]) == (self.channels[0].shape[0] * 1.0 / self.channels[0].shape[1])): if luminance.shape[0] > self.channels[0].s...
def replace_luminance(self, luminance)
Replace the Y channel of the image by the array *luminance*. If the image is not in YCbCr mode, it is converted automatically to and from that mode.
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self.invert(inverse) if stretch_parameters is None: stretch_parameters = {} stretch_parameters.update(kwargs) self.stretch(stretch, **stretch_parameters) self.gamma(gamma)
def enhance(self, inverse=False, gamma=1.0, stretch="no", stretch_parameters=None, **kwargs)
Image enhancement function. It applies **in this order** inversion, gamma correction, and stretching to the current image, with parameters *inverse* (see :meth:`Image.invert`), *gamma* (see :meth:`Image.gamma`), and *stretch* (see :meth:`Image.stretch`).
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if(isinstance(gamma, (list, tuple, set)) and len(gamma) != len(self.channels)): raise ValueError("Number of channels and gamma components differ.") if isinstance(gamma, (tuple, list)): gamma_list = list(gamma) else: gamma_list = [gamma] * ...
def gamma(self, gamma=1.0)
Apply gamma correction to the channels of the image. If *gamma* is a tuple, then it should have as many elements as the channels of the image, and the gamma correction is applied elementwise. If *gamma* is a number, the same gamma correction is applied on every channel, if there are seve...
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logger.debug("Applying stretch %s with parameters %s", stretch, str(kwargs)) ch_len = len(self.channels) if self.mode.endswith("A"): ch_len -= 1 if((isinstance(stretch, tuple) or isinstance(stretch, list))): if len(...
def stretch(self, stretch="crude", **kwargs)
Apply stretching to the current image. The value of *stretch* sets the type of stretching applied. The values "histogram", "linear", "crude" (or "crude-stretch") perform respectively histogram equalization, contrast stretching (with 5% cutoff on both sides), and contrast stretching witho...
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if(isinstance(invert, (tuple, list)) and len(self.channels) != len(invert)): raise ValueError( "Number of channels and invert components differ.") logger.debug("Applying invert with parameters %s", str(invert)) if isinstance(invert, (tuple, list))...
def invert(self, invert=True)
Inverts all the channels of a image according to *invert*. If invert is a tuple or a list, elementwise invertion is performed, otherwise all channels are inverted if *invert* is true (default). Note: 'Inverting' means that black becomes white, and vice-versa, not that the values are negated !
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logger.info("Perform a histogram equalized contrast stretch.") if(self.channels[ch_nb].size == np.ma.count_masked(self.channels[ch_nb])): logger.warning("Nothing to stretch !") return arr = self.channels[ch_nb] nwidth = 2048.0 carr ...
def stretch_hist_equalize(self, ch_nb)
Stretch the current image's colors by performing histogram equalization on channel *ch_nb*.
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logger.debug("Perform a logarithmic contrast stretch.") if ((self.channels[ch_nb].size == np.ma.count_masked(self.channels[ch_nb])) or (self.channels[ch_nb].min() == self.channels[ch_nb].max())): logger.warning("Nothing to stretch !") return ...
def stretch_logarithmic(self, ch_nb, factor=100.)
Move data into range [1:factor] and do a normalized logarithmic enhancement.
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logger.debug("Perform a linear contrast stretch.") if((self.channels[ch_nb].size == np.ma.count_masked(self.channels[ch_nb])) or self.channels[ch_nb].min() == self.channels[ch_nb].max()): logger.warning("Nothing to stretch !") return arr ...
def stretch_linear(self, ch_nb, cutoffs=(0.005, 0.005))
Stretch linearly the contrast of the current image on channel *ch_nb*, using *cutoffs* for left and right trimming.
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if min_stretch is None: min_stretch = self.channels[ch_nb].min() if max_stretch is None: max_stretch = self.channels[ch_nb].max() if isinstance(min_stretch, (list, tuple)): min_stretch = min_stretch[ch_nb] if isinstance(max_stretch, (list, t...
def crude_stretch(self, ch_nb, min_stretch=None, max_stretch=None)
Perform simple linear stretching (without any cutoff) on the channel *ch_nb* of the current image and normalize to the [0,1] range.
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if self.mode not in ("L", "LA"): raise ValueError("Image should be grayscale to colorize") if self.mode == "LA": alpha = self.channels[1] else: alpha = None self.channels = colormap.colorize(self.channels[0]) if alpha is not None: ...
def colorize(self, colormap)
Colorize the current image using *colormap*. Works only on"L" or "LA" images.
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if self.mode not in ("L", "LA"): raise ValueError("Image should be grayscale to colorize") self.channels[0], self.palette = colormap.palettize(self.channels[0]) if self.mode == "L": self.mode = "P" else: self.mode = "PA"
def palettize(self, colormap)
Palettize the current image using *colormap*. Works only on"L" or "LA" images.
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def f_inv(arr): return np.where(arr > 6.0/29.0, arr ** 3, 3 * (6.0 / 29.0) * (6.0 / 29.0) * (arr - 4.0 / 29.0)) new_l = (l__ + 16.0) / 116.0 x__ = 95.047 * f_inv(new_l + a__ / 500.0) y__ = 100.0 * f_inv(new_l) z__ = 108.883 * f...
def lab2xyz(l__, a__, b__)
Convert L*a*b* to XYZ, L*a*b* expressed within [0, 1].
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def f__(arr): return np.where(arr > 216.0 / 24389.0, arr ** (1.0/3.0), (1.0 / 3.0) * (29.0 / 6.0) * (29.0 / 6.0) * arr + 4.0 / 29.0) fy_ = f__(y__ / 100.0) l__ = 116 * fy_ - 16 a__ = 500.0 * (f__(x__ / 95.047...
def xyz2lab(x__, y__, z__)
Convert XYZ to L*a*b*.
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h_rad = np.deg2rad(h__) l2_ = l__ * 61 + 9 angle = np.pi / 3.0 - h_rad r__ = (l__ * 311 + 125) * c__ a__ = np.sin(angle) * r__ b__ = np.cos(angle) * r__ return l2_, a__, b__
def hcl2lab(h__, c__, l__)
HCL to L*ab
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l2_ = (l__ - 9) / 61.0 r__ = np.sqrt(a__*a__ + b__*b__) s__ = r__ / (l2_ * 311 + 125) angle = np.arctan2(a__, b__) c__ = np.rad2deg(np.pi / 3 - angle)%360 return c__, s__, l2_
def lab2hcl(l__, a__, b__)
L*a*b* to HCL
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5.103335
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r2_ = r__ / 255.0 g2_ = g__ / 255.0 b2_ = b__ / 255.0 def f__(arr): return np.where(arr > 0.04045, ((arr + 0.055) / 1.055) ** 2.4, arr / 12.92) r2_ = f__(r2_) * 100 g2_ = f__(g2_) * 100 b2_ = f__(b2_) * 100 x__ = ...
def rgb2xyz(r__, g__, b__)
RGB to XYZ
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x2_ = x__ / 100.0 y2_ = y__ / 100.0 z2_ = z__ / 100.0 r__ = x2_ * 3.2406 + y2_ * -1.5372 + z2_ * -0.4986 g__ = x2_ * -0.9689 + y2_ * 1.8758 + z2_ * 0.0415 b__ = x2_ * 0.0557 + y2_ * -0.2040 + z2_ * 1.0570 def finv(arr): return np.where(arr > 0.0031308, ...
def xyz2rgb(x__, y__, z__)
XYZ colorspace to RGB
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limit = now() - settings.USER_TASKS_MAX_AGE # UserTaskArtifacts will also be removed via deletion cascading UserTaskStatus.objects.filter(created__lt=limit).delete()
def purge_old_user_tasks()
Delete any UserTaskStatus and UserTaskArtifact records older than ``settings.USER_TASKS_MAX_AGE``. Intended to be run as a scheduled task.
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