ayrisdev/crawl4ai
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add model parameter for clustring.

Browse Source
This commit is contained in:
unclecode
2024-05-13 00:06:16 +08:00
parent cf087cfa58
commit 7679064521
2 changed files with 20 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
crawl4ai/extraction_strategy.py
View File

@@ -118,7 +118,7 @@ class LLMExtractionStrategy(ExtractionStrategy):
return parsed_json return parsed_json
class HierarchicalClusteringStrategy(ExtractionStrategy): class HierarchicalClusteringStrategy(ExtractionStrategy):
def __init__(self, word_count_threshold=20, max_dist=0.2, linkage_method='ward', top_k=3): def __init__(self, word_count_threshold=20, max_dist=0.2, linkage_method='ward', top_k=3, model_name = 'BAAI/bge-small-en-v1.5'):
""" """
Initialize the strategy with clustering parameters. Initialize the strategy with clustering parameters.
@@ -132,17 +132,22 @@ class HierarchicalClusteringStrategy(ExtractionStrategy):
self.max_dist = max_dist self.max_dist = max_dist
self.linkage_method = linkage_method self.linkage_method = linkage_method
self.top_k = top_k self.top_k = top_k
# self.tokenizer = BertTokenizer.from_pretrained('bert-base-uncased', resume_download=None) self.timer = time.time()
# self.model = BertModel.from_pretrained('bert-base-uncased', resume_download=None)
if model_name == "bert-base-uncased":
self.tokenizer = BertTokenizer.from_pretrained('bert-base-uncased', resume_download=None)
self.model = BertModel.from_pretrained('bert-base-uncased', resume_download=None)
elif model_name == "sshleifer/distilbart-cnn-12-6":
# self.model = IPEXModel.from_pretrained("Intel/bge-small-en-v1.5-rag-int8-static")
# self.tokenizer = AutoTokenizer.from_pretrained("Intel/bge-small-en-v1.5-rag-int8-static")
pass
elif model_name == "BAAI/bge-small-en-v1.5":
self.tokenizer = AutoTokenizer.from_pretrained('BAAI/bge-small-en-v1.5', resume_download=None)
self.model = AutoModel.from_pretrained('BAAI/bge-small-en-v1.5', resume_download=None)
self.model.eval()
self.nlp = spacy.load("models/reuters") self.nlp = spacy.load("models/reuters")
print(f"[LOG] Model loaded {model_name}, models/reuters, took " + str(time.time() - self.timer) + " seconds")
# self.model = IPEXModel.from_pretrained("Intel/bge-small-en-v1.5-rag-int8-static")
# self.tokenizer = AutoTokenizer.from_pretrained("Intel/bge-small-en-v1.5-rag-int8-static")
self.tokenizer = AutoTokenizer.from_pretrained('BAAI/bge-small-en-v1.5', resume_download=None)
self.model = AutoModel.from_pretrained('BAAI/bge-small-en-v1.5', resume_download=None)
self.model.eval()
def get_embeddings(self, sentences: List[str]): def get_embeddings(self, sentences: List[str]):
""" """
@@ -154,13 +159,11 @@ class HierarchicalClusteringStrategy(ExtractionStrategy):
# Tokenize sentences and convert to tensor # Tokenize sentences and convert to tensor
encoded_input = self.tokenizer(sentences, padding=True, truncation=True, return_tensors='pt') encoded_input = self.tokenizer(sentences, padding=True, truncation=True, return_tensors='pt')
# Compute token embeddings # Compute token embeddings
t = time.time()
with torch.no_grad(): with torch.no_grad():
model_output = self.model(**encoded_input) model_output = self.model(**encoded_input)
# Get embeddings from the last hidden state (mean pooling) # Get embeddings from the last hidden state (mean pooling)
embeddings = model_output.last_hidden_state.mean(1) embeddings = model_output.last_hidden_state.mean(1)
print(f"Embeddings computed in {time.time() - t:.2f} seconds")
return embeddings.numpy() return embeddings.numpy()
def hierarchical_clustering(self, sentences: List[str]): def hierarchical_clustering(self, sentences: List[str]):
@@ -171,7 +174,9 @@ class HierarchicalClusteringStrategy(ExtractionStrategy):
:return: NumPy array of cluster labels. :return: NumPy array of cluster labels.
""" """
# Get embeddings # Get embeddings
self.timer = time.time()
embeddings = self.get_embeddings(sentences) embeddings = self.get_embeddings(sentences)
print(f"[LOG] 🚀 Embeddings computed in {time.time() - self.timer:.2f} seconds")
# Compute pairwise cosine distances # Compute pairwise cosine distances
distance_matrix = pdist(embeddings, 'cosine') distance_matrix = pdist(embeddings, 'cosine')
# Perform agglomerative clustering respecting order # Perform agglomerative clustering respecting order
@@ -214,7 +219,7 @@ class HierarchicalClusteringStrategy(ExtractionStrategy):
# Perform clustering # Perform clustering
labels = self.hierarchical_clustering(text_chunks) labels = self.hierarchical_clustering(text_chunks)
print(f"Clustering done in {time.time() - t:.2f} seconds") print(f"[LOG] 🚀 Clustering done in {time.time() - t:.2f} seconds")
# Organize texts by their cluster labels, retaining order # Organize texts by their cluster labels, retaining order
t = time.time() t = time.time()
@@ -235,7 +240,7 @@ class HierarchicalClusteringStrategy(ExtractionStrategy):
top_categories = sorted(doc.cats.items(), key=lambda x: x[1], reverse=True)[:tok_k] top_categories = sorted(doc.cats.items(), key=lambda x: x[1], reverse=True)[:tok_k]
cluster['tags'] = [cat for cat, _ in top_categories] cluster['tags'] = [cat for cat, _ in top_categories]
print(f"Categorization done in {time.time() - t:.2f} seconds") print(f"[LOG] 🚀 Categorization done in {time.time() - t:.2f} seconds")
return cluster_list return cluster_list

2
crawl4ai/web_crawler.py
View File

@@ -75,7 +75,7 @@ class WebCrawler:
parsed_json = [] parsed_json = []
if extract_blocks_flag: if extract_blocks_flag:
print(f"[LOG] 🚀 Extracting semantic blocks for {url_model.url}") print(f"[LOG] 🔥 Extracting semantic blocks for {url_model.url}")
t = time.time() t = time.time()
# Split markdown into sections # Split markdown into sections
sections = chunking_strategy.chunk(markdown) sections = chunking_strategy.chunk(markdown)