OpenAI
¶
Bases: BaseRepresentation
Using the OpenAI API to generate topic labels based on one of their Completion of ChatCompletion models.
The default method is `openai.Completion` if `chat=False`.
The prompts will also need to follow a completion task. If you
are looking for a more interactive chats, use `chat=True`
with `model=gpt-3.5-turbo`.
For an overview see:
https://platform.openai.com/docs/models
Arguments:
client: A `openai.OpenAI` client
model: Model to use within OpenAI, defaults to `"text-ada-001"`.
NOTE: If a `gpt-3.5-turbo` model is used, make sure to set
`chat` to True.
generator_kwargs: Kwargs passed to `openai.Completion.create`
for fine-tuning the output.
prompt: The prompt to be used in the model. If no prompt is given,
`self.default_prompt_` is used instead.
NOTE: Use `"[KEYWORDS]"` and `"[DOCUMENTS]"` in the prompt
to decide where the keywords and documents need to be
inserted.
delay_in_seconds: The delay in seconds between consecutive prompts
in order to prevent RateLimitErrors.
exponential_backoff: Retry requests with a random exponential backoff.
A short sleep is used when a rate limit error is hit,
then the requests is retried. Increase the sleep length
if errors are hit until 10 unsuccesfull requests.
If True, overrides `delay_in_seconds`.
chat: Set this to True if a GPT-3.5 model is used.
See: https://platform.openai.com/docs/models/gpt-3-5
nr_docs: The number of documents to pass to OpenAI if a prompt
with the `["DOCUMENTS"]` tag is used.
diversity: The diversity of documents to pass to OpenAI.
Accepts values between 0 and 1. A higher
values results in passing more diverse documents
whereas lower values passes more similar documents.
doc_length: The maximum length of each document. If a document is longer,
it will be truncated. If None, the entire document is passed.
tokenizer: The tokenizer used to calculate to split the document into segments
used to count the length of a document.
* If tokenizer is 'char', then the document is split up
into characters which are counted to adhere to `doc_length`
* If tokenizer is 'whitespace', the document is split up
into words separated by whitespaces. These words are counted
and truncated depending on `doc_length`
* If tokenizer is 'vectorizer', then the internal CountVectorizer
is used to tokenize the document. These tokens are counted
and trunctated depending on `doc_length`
* If tokenizer is a callable, then that callable is used to tokenize
the document. These tokens are counted and truncated depending
on `doc_length`
Usage:
To use this, you will need to install the openai package first:
`pip install openai`
Then, get yourself an API key and use OpenAI's API as follows:
```python
import openai
from bertopic.representation import OpenAI
from bertopic import BERTopic
# Create your representation model
client = openai.OpenAI(api_key=MY_API_KEY)
representation_model = OpenAI(client, delay_in_seconds=5)
# Use the representation model in BERTopic on top of the default pipeline
topic_model = BERTopic(representation_model=representation_model)
```
You can also use a custom prompt:
```python
prompt = "I have the following documents: [DOCUMENTS]
These documents are about the following topic: '"
representation_model = OpenAI(client, prompt=prompt, delay_in_seconds=5)
If you want to use OpenAI's ChatGPT model:
python
representation_model = OpenAI(client, model="gpt-3.5-turbo", delay_in_seconds=10, chat=True)
```
Source code in bertopic\representation\_openai.py
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extract_topics(topic_model, documents, c_tf_idf, topics)
¶
Extract topics
Parameters:
Name | Type | Description | Default |
---|---|---|---|
topic_model |
A BERTopic model |
required | |
documents |
DataFrame
|
All input documents |
required |
c_tf_idf |
csr_matrix
|
The topic c-TF-IDF representation |
required |
topics |
Mapping[str, List[Tuple[str, float]]]
|
The candidate topics as calculated with c-TF-IDF |
required |
Returns:
Name | Type | Description |
---|---|---|
updated_topics |
Mapping[str, List[Tuple[str, float]]]
|
Updated topic representations |
Source code in bertopic\representation\_openai.py
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