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d e ZdS ) N)Literal) AgentAction AgentFinish)Field)override)AgentOutputParsertextreturnc x ddddddd}| D ]\ }}| || } | S )z1Convert custom tag delimiters back into XML tags.zzz z
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ZdS ) XMLAgentOutputParsera Parses tool invocations and final answers from XML-formatted agent output.
This parser extracts structured information from XML tags to determine whether
an agent should perform a tool action or provide a final answer. It includes
built-in escaping support to safely handle tool names and inputs
containing XML special characters.
Args:
escape_format: The escaping format to use when parsing XML content.
Supports 'minimal' which uses custom delimiters like [[tool]] to replace
XML tags within content, preventing parsing conflicts.
Use 'minimal' if using a corresponding encoding format that uses
the _escape function when formatting the output (e.g., with format_xml).
Expected formats:
Tool invocation (returns AgentAction):
search
what is 2 + 2
Final answer (returns AgentFinish):
The answer is 4
!!! note
Minimal escaping allows tool names containing XML tags to be safely represented.
For example, a tool named `searchnested` would be escaped as
`search[[tool]]nested[[/tool]]` in the XML and automatically unescaped during
parsing.
Raises:
ValueError: If the input doesn't match either expected XML format or
contains malformed XML structure.
minimal)defaultN
escape_formatr r
c t j d|t j }|rt | dk r"dt | d}t | |d }t j d|t j }t | dk r"dt | d}t | |r|d nd}| j d k r t
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| }t d|i| S d}t | )Nz(.*?) zHMalformed tool invocation: expected exactly one block, but found .r z (.*?)zNMalformed tool invocation: expected at most one block, but found r )tool
tool_inputlogzzz"(.*?)zNMalformed output: expected exactly one ... block.output)
return_valuesr zTMalformed output: expected either a tool invocation or a final answer in XML format.) refindallDOTALLlen
ValueErrorr r r r ) selfr tool_matchesmsg_tool
input_matches _tool_inputmatchesanswers r parsezXMLAgentOutputParser.parseE s z"7ryII M< A%%6!$\!2!26 6 6 !oo% OE J14 M =!!A%%>(+M(:(:> > > !oo%.;C-**K !Y..!%(( ' 4 4 EktLLL L t # #(9T(A(Aj!FbiXXG7||q > !oo% QZF!Y.."6** h-?TJJJ J
/ oo r c t )N)NotImplementedErrorr' s r get_format_instructionsz,XMLAgentOutputParser.get_format_instructionsx s !!r c dS )Nz xml-agent r2 s r _typezXMLAgentOutputParser._type| s {r )__name__
__module__ __qualname____doc__r r r __annotations__r strr r r/ r3 propertyr6 r5 r r r r s B 05uY/G/G/GM79%,GGG 0 # 0 + "; 0 0 0 X0 d " " " " X" s X r r )r" typingr langchain_core.agentsr r pydanticr typing_extensionsr langchain_classic.agentsr r< r r r5 r r rC s : : : : : : : : & & & & & & 6 6 6 6 6 6 C C d d d d d, d d d d dr