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Slot Example Rasa

7/16/2022
Slot Example Rasa 8,8/10 7129 votes

The slot is getting set but when i try with tracker.slots'sample' = value the slot value not persisting between the actions, I am writing a function with parameter as tracker so I need a way to set slot using tracker object or any solution to set slot from one helper function, So is there any way to persiste tracker.slotskey = value in. The slot mapping defines how the slots are filled. In your example 'numpeople': self.fromentity(entity='number')means that the form tries to fill the slot numpeople with an extracted entity number. Whenever the form action is called it checks the latest user messages and which entities Rasa NLU extracted.

From rasasdk.events import SlotSet. Then in you run method, you can set your value in relevant slot. Imagine you slot name for humidity is weatherhumidity. Then imagine your humidity value from the API is extracted for a variable called humidity. Then in your custom action run method, simply set the slot value with below line. Rasa.db file is a database where all the conversation with your bot Is stored. Domain.yml file: In which you are storing all the actions, intents, entities, templates and slots. One of these items happens to be the Tabula E-Rasa. I’d have to say that this is one of the most expensive items in Cyberpunk 2077, and one of the most highly sought-after as well since it.

Text Slot¶

Slot
text
Use For:

User preferences where you only care whether or not they’vebeen specified.

Example:
Description:

rasa_core.slots.SlotResults in the feature of the slot being set to 1 if any value is set.Otherwise the feature will be set to 0 (no value is set).

Boolean Slot¶

Slot Example Rasa Mp3

bool
Use For:

True or False

Example:
Description:

Checks if slot is set and if True

Categorical Slot¶

categorical
Use For:

Slots which can take one of N values

Example:
Description:

Creates a one-hot encoding describing which of the values matched.

Float Slot¶

float
Use For:

Continuous values

Example:
Defaults:

max_value=1.0, min_value=0.0

Description:

All values below min_value will be treated as min_value, the samehappens for values above max_value. Hence, if max_value is set to1, there is no difference between the slot values 2 and 3.5 interms of featurization (e.g. both values will influence the dialogue inthe same way and the model can not learn to differentiate between them).

List Slot¶

list
Use For:

Lists of values

Example:
Description:

The feature of this slot is set to 1 if a value with a list is set,where the list is not empty. If no value is set, or the empty list is theset value, the feature will be 0. The length of the list stored inthe slot does not influence the dialogue.

Unfeaturized Slot¶

unfeaturized
Use For:

Data you want to store which shouldn’t influence the dialogue flow

Example:
Description:

There will not be any featurization of this slot, hence its value doesnot influence the dialogue flow and is ignored when predicting the nextaction the bot should run.

The Slot base class¶

class rasa_core.slots.Slot(name, initial_value=None, value_reset_delay=None, auto_fill=True)[source]
feature_dimensionality()[source]

How many features this single slot creates.

The dimensionality of the array returned by as_feature needsto correspond to this value.

as_feature()[source]

Have questions or feedback?¶

We have a very active support community on Rasa Community Forumthat is happy to help you with your questions. If you have any feedback for us or a specificsuggestion for improving the docs, feel free to share it by creating an issue on Rasa CoreGitHub repository.

Here is the full list of slot types defined by Rasa Core.

Slot Example Rasa

Slots are your bot’s memory. They act as a key-value storewhich can be used to store information the user provided (e.g their home city)as well as information gathered about the outside world (e.g. the result of adatabase query).

Most of the time, you want slots to influence how the dialogue progresses.There are different slot types for different behaviors.

Slot example rasa video

For example, if your user has provided their home city, you mighthave a text slot called home_city. If the user asks for theweather, and you don’t know their home city, you will have to askthem for it. A text slot only tells Rasa Core whether the slothas a value. The specific value of a text slot (e.g. Bangaloreor New York or Hong Kong) doesn’t make any difference.

If the value itself is important, use a categorical or a bool slot.There are also float, and list slots.If you just want to store some data, but don’t want it to affect the flowof the conversation, use an unfeaturized slot.

Rasa

How Rasa Uses Slots¶

The rasa_core.policies.Policy doesn’t have access to thevalue of your slots. It receives a featurized representation.As mentioned above, for a text slot the value is irrelevant.The policy just sees a 1 or 0 depending on whether it is set.

You should choose your slot types carefully!

How Slots Get Set¶

You can provide an initial value for a slot in your domain file:

There are multiple ways that slots are set during a conversation:

Slots Set from NLU¶

Slot Example Rasa Al

If your NLU model picks up an entity, and your domain contains aslot with the same name, the slot will be set automatically. For example:

In this case, you don’t have to include the -slot{} part in thestory, because it is automatically picked up.

Slots Set By Clicking Buttons¶

You can use buttons as a shortcut.Rasa Core will send messages starting with a / to theRegexInterpreter, which expects NLU input in the same formatas in story files, e.g. /intent{entities}. For example, if you letusers choose a color by clicking a button, the button payloads mightbe /choose{'color':'blue'} and /choose{'color':'red'}.

You can specify this in your domain file like this:(see details in Domain Format)

Slots Set by Actions¶

The second option is to set slots by returning events in Actions.In this case, your stories need to include the slots.For example, you have a custom action to fetch a user’s profile, andyou have a categorical slot called account_type.When the fetch_profile action is run, it returns arasa_core.events.SlotSet event:

In this case you do have to include the -slot{} part in your stories.Rasa Core will learn to use this information to decide on the correct action totake (in this case, utter_welcome_premuim or utter_welcome_basic).

Slot example rasa video

Note

It is very easy to forget about slots if you are writingstories by hand. We strongly recommend that you build up thesestories using Interactive Learning rather than writing them.

Custom Slot Types¶

Slot Example Rasa Video

Maybe your restaurant booking system can only handle bookingsfor up to 6 people. In this case you want the value of theslot to influence the next selected action (and not just whetherit’s been specified). You can do this by defining a custom slot class.

In the code below, we define a slot class called NumberOfPeopleSlot.The featurization defines how the value of this slot gets converted to a vectorto our machine learning model can deal with.Our slot has three possible “values”, which we can represent witha vector of length 2.

(0,0)not yet set
(1,0)between 1 and 6
(0,1)more than 6

Now we also need some training stories, so that Rasa Corecan learn from these how to handle the different situations:

Have questions or feedback?¶

We have a very active support community on Rasa Community Forumthat is happy to help you with your questions. If you have any feedback for us or a specificsuggestion for improving the docs, feel free to share it by creating an issue on Rasa CoreGitHub repository.