@h JSrSSKrSSKJrJr SSKJr /SQr"SS\5rg)z4Callback Handler streams to stdout on new llm token.N)AnyOptional)StreamingStdOutCallbackHandler)FinalAnswer:c ^\rSrSrSrS\SS4SjrS\4SjrSSS S .S \ \ \S \S \SS4U4Sjjjr S\ \\ 4S\ \S\ SS4SjrS\S\ SS4SjrSrU=r$)#FinalStreamingStdOutCallbackHandler zCallback handler for streaming in agents. Only works with agents using LLMs that support streaming. Only the final output of the agent will be streamed. tokenreturnNcRURRU5 URRUR55 [ UR5[ UR 5:a7URR S5 URR S5 gg)Nr) last_tokensappendlast_tokens_strippedstriplenanswer_prefix_tokenspop)selfr s g/var/www/html/shao/venv/lib/python3.13/site-packages/langchain/callbacks/streaming_stdout_final_only.pyappend_to_last_tokens9FinalStreamingStdOutCallbackHandler.append_to_last_tokenss| & !!((7 t 3t'@'@#A A     #  % % ) )! , BcUR(aURUR:H$URUR:H$)N) strip_tokensranswer_prefix_tokens_strippedrr)rs rcheck_if_answer_reached;FinalStreamingStdOutCallbackHandler.check_if_answer_reacheds9   ,,0R0RR R4#<#<<[TU]5 Uc [UlOXlU(a/URVs/sHoDR 5PM snUlOURUlS/[ UR5-UlS/[ UR5-UlX l X0l SUl gs snf)aInstantiate FinalStreamingStdOutCallbackHandler. Args: answer_prefix_tokens: Token sequence that prefixes the answer. Default is ["Final", "Answer", ":"] strip_tokens: Ignore white spaces and new lines when comparing answer_prefix_tokens to last tokens? (to determine if answer has been reached) stream_prefix: Should answer prefix itself also be streamed? NF) super__init__DEFAULT_ANSWER_PREFIX_TOKENSrrrrrrrr answer_reached)rrrr r __class__s rr$,FinalStreamingStdOutCallbackHandler.__init__s"   '(DD %(< % +/+D+D2+D% +D2D .261J1JD .4#d&?&?"@@%'D3t/H/H+I$I!(*#2sB< serializedpromptskwargsc SUlg)zRun when LLM starts running.FN)r&)rr)r*r+s r on_llm_start0FinalStreamingStdOutCallbackHandler.on_llm_start@s $rc URU5 UR5(aiSUlUR(aPURH"n[ R RU5 M$ [ R R5 gUR(a>[ R RU5 [ R R5 gg)z?Run on new LLM token. Only available when streaming is enabled.TN) rrr&r rsysstdoutwriteflush)rr r+ts ron_llm_new_token4FinalStreamingStdOutCallbackHandler.on_llm_new_tokenIs ""5)  ' ' ) )"&D !!))AJJ$$Q'*   "     JJ  U # JJ    r)rrr&rrr r)__name__ __module__ __qualname____firstlineno____doc__strrboolrrlistr$dictrr-r5__static_attributes__ __classcell__)r's@rr r s -3-4-==59!# $'tCy1 $ $  $  $ $D$cN$c$ $  $cSTrr ) r;r0typingrrlangchain_core.callbacksrr%r rrrEs&: C7P*HPr