I am writing an extensive problem in pyomo in which i need to activate and deactivate assets in projects. I think the easiest way to model this is to write an abstract model and then put each asset into a block. Then every time a model would be instanciated it would be possible to activate only certain type of blocks and a certain number of each blocks (ie 3 block wind turbine). Therefore the block will be indexed. Inside these blocks I define parameters that are time dependent but the time will be a shared index between all so it won't be local set but a general set.
Here is a short example of the typical situation I am running into:
import pyomo.environ as pm
model=pm.AbstractModel()
model.A=pm.Set()
model.T=pm.Set(ordered=True) #the set of Time
def Ablock(b,g):
b.A_param=pm.Param(model.T)
model.A_block=pm.Block(model.A,rule=Ablock)
Amodel_dict = \
{None : dict(
A = {None:[1,2,3]},
T = {None:[4,12,23]},
A_block = { 1: dict(A_param = { 4:3, 12:4, 23:5}),
2: dict(A_param = { 4:5, 12:6, 23:7}),
3: dict(A_param = { 4:8, 12:9, 23:10})}
)
}
instance=model.create_instance(data=Amodel_dict)
This gives the error:
RuntimeError: Failed to set value for param=A_block[1].A_param, index=4, value=3.
source error message="Index '4' is not valid for indexed component 'A_block[1].A_param'"
Intuitively i feel it is wrong to call for model.T inside the function Ablock as it is not supposed to know what it refers to but if i give it as an argument of the function, it modifies the block creation to block indexed on time as well. Do you have any idea how to solve this ?
I found the solution that was quite simple but very practical. Instead of calling model.T one should navigate in the hierarchical structure by using the functions model() or parent_block().
A solution for my problem is to call:
b.model().T or b.parent_block().T
Related
In the context of a Flutter 2.0.5 app whose state I'd like to manage with Riverpod, I thought I can declare a StateNotifierProvider like this:
import 'package:flutter_riverpod/flutter_riverpod.dart';
final counterProvider = StateNotifierProvider<CounterStateNotifier>((ref) => CounterStateNotifier());
class CounterStateNotifier extends StateNotifier<int> {
CounterStateNotifier([int count = 0]) : super(count);
void increment() => state++;
}
But Android Studio (and later the Dart compiler as well) complains about the line where I declare the counterProvider variable:
The type 'StateNotifierProvider' is declared with 2 type parameters, but 1 type arguments were given.
Removing the <CounterStateNotifier> type parameter in StateNotifierProvider<CounterStateNotifier> removes the error. However, attempting to read the provider and call its increment method (setting () => context.read(counterProvider).increment() as the onPressed of an ElevatedButton, then pressing the button) gives the following runtime error:
'increment'
method not found
Receiver: 0
Arguments: []
Why is context.read(counterProvider) returning the int state instead of the notifier? And what is the reason behind the type parameter error mentioned in the first part of my question?
I should mention that I'm running my app on the web (with flutter run -d Chrome).
As of Riverpod 0.14.0, State is the default value exposed by StateNotifierProvider.
The syntax for declaring your StateNotifierProvider is now as follows:
final counterProvider = StateNotifierProvider<CounterStateNotifier, int>((ref) => CounterStateNotifier());
Accessing functions now requires adding .notifier (accessing the StateNotifier itself):
context.read(counterProvider.notifier).increment();
And like you've noticed, you now access the state like so:
final count = context.read(counterProvider);
More on the changes here.
You may also use dynamic to accept any type if value for the StateNotifierProvider
final modelProvider =
StateNotifierProvider.autoDispose<ModelClassName, dynamic>(
(ref) => ModelClassName());
I recently upgraded my tesnorflow from Rev8 to Rev12. In Rev8 the default "state_is_tuple" flag in rnn_cell.LSTMCell is set to False, so I initialized my LSTM Cell with an list, see code below.
#model definition
lstm_cell = rnn_cell.LSTMCell(self.config.hidden_dim)
outputs, states = tf.nn.rnn(lstm_cell, data, initial_state=self.init_state)
#init_state place holder and feed_dict
def add_placeholders(self):
self.init_state = tf.placeholder("float", [None, self.cell_size])
def get_feed_dict(self, data, label):
feed_dict = {self.input_data: data,
self.input_label: reg_label,
self.init_state: np.zeros((self.config.batch_size, self.cell_size))}
return feed_dict
In Rev12, the default "state_is_tuple" flag is set to True, in order to make my old code work I had to explicitly turn the flag to False. However, now I got an warning from tensorflow saying:
"Using a concatenated state is slower and will soon be deprecated.
Use state_is_tuple=True"
I tried to initialize LSTM cell with a tuple by changing the placeholder definition for self.init_state to the following:
self.init_state = tf.placeholder("float", (None, self.cell_size))
but now I got an error message saying:
"'Tensor' object is not iterable"
Does anyone know how to make this work?
Feeding a "zero state" to an LSTM is much simpler now using cell.zero_state. You do not need to explicitely define the initial state as a placeholder. Define it as a tensor instead and feed it if required. This is how it works,
lstm_cell = rnn_cell.LSTMCell(self.config.hidden_dim)
self.initial_state = lstm_cell.zero_state(self.batch_size, dtype=tf.float32)
outputs, states = tf.nn.rnn(lstm_cell, data, initial_state=self.init_state)
If you wish to feed some other value as the initial state, Let's say next_state = states[-1] for instance, calculate it in your session and pass it in the feed_dict like -
feed_dict[self.initial_state] = next_state
In the context of your question, lstm_cell.zero_state() should suffice.
Unrelated, but remember that you can pass both Tensors and Placeholders in the feed dictionary! That's how self.initial_state is working in the example above. Have a look at the PTB Tutorial for a working example.
Is it somehow possible to add the sub-group of a cetrain group the address is assigned to the html output?
In the template I have ###MAINGROUP### and ###GROUPLIST###. I can't use maingroup, cause it's not the case that the group I need is always the maingroup. And with the grouplist I can't say which group is the sub-group of the one group.
Anyone have an idea how I could do it?
And in addition to that I also need the value of a self created field in the tt_address table.
Edit:
I try it like #lorenz say. What I have so far:
ext_localconf.php:
<?php
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['tt_address']['extraItemMarkerHook'][]
='EXT:txnextaddresssort/class.tx_next_address_sort_addmarkers.php:tx_next_address_sort_addmarkers';
class.tx_next_address_sort_addmarkers.php:
<?php
class tx_next_address_sort_addmarkers {
function extraItemMarkerProcessor(&$markerArray, &$address, &$lConf,
&$pObj) {
$lcObj = t3lib_div::makeInstance('tslib_cObj');
$lcObj->data = $address;
$markerArray['###SORTBEREICH###'] =
$lcObj->stdWrap($address['tx_nextaddresssort_sort_bereich'],
$lConf['tx_nextaddresssort_sort_bereich.']);
}
}
Extentionkey: next_address_sort
All I get is a blank screen, but no errors in apache log
No, there is no possibility to do that.
Yet you can write a custom extension that integrates the extraItemMarkerProcessorhook in tt_address. In ext_localconf.php, add:
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['tt_address']['extraItemMarkerHook'][] ='EXT:myextension/class.tx_myextension_filename.php:tx_myextension_classname';
Then add a file class.tx_myextension_filename.php to your extension.:
class tx_myextension_classname {
public function extraItemMarkerProcessor(&$markerArray, &$address, &$lConf, &$pObj) {
$lcObj = t3lib_div::makeInstance('tslib_cObj');
$lcObj->data = $address;
$markerArray['###MYFIELD###'] = $lcObj->stdWrap($address['myfieldlikeindatabase'], $lConf['myfieldlikeindatabase.']);
return $markerArray;
}
}
This would be an example for getting a field that is in the tt_address table and adding it to the markers so they can be used in a template. It is also stdWrap enabled.
Now, instead of getting a field, you should replace $address['myfieldlikeindatabase'] with a variable that contains the information you need. To receive the data, you can use the TYPO3 database API functions ($GLOBALS['TYPO3_DB']).
I want to extend the Wso2 CEP product in our needs and try to write a custom condition as indicated in this official wso2 cep link.
I am able to write an extension class that extends "org.wso2.siddhi.core.executor.conditon.AbstractGenericConditionExecutor" and implement its abstract method as indicated below:
#SiddhiExtension(namespace = "myext", function = "startswithA")
public class StringUtils extends
org.wso2.siddhi.core.executor.conditon.AbstractGenericConditionExecutor {
static Log log = LogFactory.getLog(StringUtils.class);
#Override
public boolean execute(AtomicEvent atomicEvent) {
log.error("Entered the execute method");
log.error("Atomic event to string: " + atomicEvent.toString());
return true;
}
}
when i use this extensioned method as:
from allEventsStream[myext:startswithA(name)]
insert into selectedEventsStream *;
In this situation, i want that startswithA method returns true if the name field has 'A' at the begining of it. However when i run this query in CEP the whole event drops into my execute function i.e. there is no sign to show that i send "name" field is sent to startswithA method as argument.
How can i understand which field of the stream is sent to my extended method as argument?
Also i want to write conditions like
from allEventsStream[myext:startswith('A', name)]
insert into selectedEventsStream *;
How can i achive this?
In 'AbstractGenericConditionExecutor' there's another method that gives you the set of expression executors that are included in the parameters when executor instantiates:
public void setExpressionExecutors(List<ExpressionExecutor> expressionExecutors)
You don't necessarily have to override this method and store the list, it is already stored there in the 'AbastractGenericConditionExecutor' as a list named expressionExecutors. You can pass the event to these executors to retrieve the relevant values from the event in order.
For an example, if you include a variable (like 'name') in the query (as a parameter at index 0), you'll get a 'VariableExpressionExecutor' in the list at index 0 that will fetch you the value of the variable from the event. Similarly for a constant like 'A', you'll get a different executor that will give you the value 'A' when called.
To add to Rajeev's answer, if you want to filter all the names that starts with 'A', you can override the execute method of your custom Siddhi extension similar to the following segment.
#Override
public boolean execute(AtomicEvent atomicEvent) {
if(!this.expressionExecutors.isEmpty()) {
String name = (String)this.expressionExecutors.get(0).execute(atomicEvent);
if(name.startsWith("A")) {
return true;
}
}
return false;
}
When writing the query, it would be similar to
from allEventStream[myext:startsWithA(name)]
insert into filteredStream *;
You can extend this behaviour to achieve an extension that supports
from allEventsStream[myext:startswith('A', name)]
type queries as well.
HTH,
Lasantha
I use console.log() a lot, especially in combination with Ember.inspect(). But there's one thing I miss:
How can I find out the type of an object (Class)?
For example: Getting something like <Sandbox.ApplicationController:ember288> when inspecting Ember.get("controller")?
If you just want the model name (for example app/models/comment.js has the model name comment), you can use thing.constructor.modelName.
For example:
var aComment = this.get('store').createRecord('comment');
aComment.get('constructor.modelName') // => 'comment'
I understand you are looking for a string for debugging purposes, but I originally came to this question wanting to know specifically how to get the type of the object, not a string describing the object.
Using the built in Javascript property constructor will yield the class used to construct the instance. For example you could do:
person = App.Person.create();
person.constructor // returns App.Person
person.constructor.toString() // return "App.Person"
If you get Class, you can usually call toString() (or as a shortcut concat an empty string + '') to get something like <Sandbox.ApplicationController:ember288>
Another useful feature (in chrome) is the dir command.
dir(App.User)
This will give you the full object information, rather than just the name.
Be aware that some of these answers suggested here only work in development. Once your code is in production most of those methods / class names will get minified.
import Model from '#ember-data/model';
export default class Animal extends Model {
// ...
}
So in development:
const model = this.store.createRecord('animal');
model.constructor.name // returns Animal
in production:
const model = this.store.createRecord('animal');
model.constructor.name // returns 'i' (or any other single letter).
To avoid this, use constructor.toString()
const model = this.store.createRecord('animal');
model.constructor.toString() // returns 'model:animal'