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community[patch]: Invoke callback prior to yielding token fix for HuggingFaceEndpoint (#20366)

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- [x] **PR title**: community[patch]: Invoke callback prior to yielding
token fix for HuggingFaceEndpoint


- [x] **PR message**: 
- **Description:** Invoke callback prior to yielding token in stream
method in community HuggingFaceEndpoint
    - **Issue:** https://github.com/langchain-ai/langchain/issues/16913
    - **Dependencies:** None
    - **Twitter handle:** @bolun_zhang

If no one reviews your PR within a few days, please @-mention one of
baskaryan, efriis, eyurtsev, hwchase17.

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>
This commit is contained in:
balloonio 2024-04-12 15:16:34 -04:00 committed by GitHub
parent ad04585e30
commit 93caa568f9
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1 changed files with 4 additions and 2 deletions
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6
libs/community/langchain_community/llms/huggingface_endpoint.py
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@ -326,9 +326,10 @@ class HuggingFaceEndpoint(LLM):
# yield text, if any
if text:
chunk = GenerationChunk(text=text)
yield chunk
if run_manager:
run_manager.on_llm_new_token(chunk.text)
yield chunk
# break if stop sequence found
if stop_seq_found:
@ -361,9 +362,10 @@ class HuggingFaceEndpoint(LLM):
# yield text, if any
if text:
chunk = GenerationChunk(text=text)
yield chunk
if run_manager:
await run_manager.on_llm_new_token(chunk.text)
yield chunk
# break if stop sequence found
if stop_seq_found: