Bases: ChainableOutputParser
Langchain输出解析器。
Source code in llama_index/output_parsers/langchain/base.py
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49 | class LangchainOutputParser(ChainableOutputParser):
"""Langchain输出解析器。"""
def __init__(
self, output_parser: "LCOutputParser", format_key: Optional[str] = None
) -> None:
"""初始化参数。"""
self._output_parser = output_parser
self._format_key = format_key
def parse(self, output: str) -> Any:
"""解析、验证和通过程序自动纠正错误。"""
# TODO: this object may be stringified by our upstream llmpredictor,
# figure out better
# ways to "convert" the object to a proper string format.
return self._output_parser.parse(output)
def format(self, query: str) -> str:
"""使用结构化的输出格式指令格式化查询。"""
format_instructions = self._output_parser.get_format_instructions()
# TODO: this is a temporary hack. if there's curly brackets in the format
# instructions (and query is a string template), we need to
# escape the curly brackets in the format instructions to preserve the
# overall template.
query_tmpl_vars = {
v for _, v, _, _ in Formatter().parse(query) if v is not None
}
if len(query_tmpl_vars) > 0:
format_instructions = format_instructions.replace("{", "{{")
format_instructions = format_instructions.replace("}", "}}")
if self._format_key is not None:
fmt_query = query.format(**{self._format_key: format_instructions})
else:
fmt_query = query + "\n\n" + format_instructions
return fmt_query
|
parse
parse(output: str) -> Any
解析、验证和通过程序自动纠正错误。
Source code in llama_index/output_parsers/langchain/base.py
| def parse(self, output: str) -> Any:
"""解析、验证和通过程序自动纠正错误。"""
# TODO: this object may be stringified by our upstream llmpredictor,
# figure out better
# ways to "convert" the object to a proper string format.
return self._output_parser.parse(output)
|
format(query: str) -> str
使用结构化的输出格式指令格式化查询。
Source code in llama_index/output_parsers/langchain/base.py
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49 | def format(self, query: str) -> str:
"""使用结构化的输出格式指令格式化查询。"""
format_instructions = self._output_parser.get_format_instructions()
# TODO: this is a temporary hack. if there's curly brackets in the format
# instructions (and query is a string template), we need to
# escape the curly brackets in the format instructions to preserve the
# overall template.
query_tmpl_vars = {
v for _, v, _, _ in Formatter().parse(query) if v is not None
}
if len(query_tmpl_vars) > 0:
format_instructions = format_instructions.replace("{", "{{")
format_instructions = format_instructions.replace("}", "}}")
if self._format_key is not None:
fmt_query = query.format(**{self._format_key: format_instructions})
else:
fmt_query = query + "\n\n" + format_instructions
return fmt_query
|