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import json
from enum import IntEnum
# import re
from typing import Any, Callable, List, Optional
from lagent.prompts.parsers import StrParser
from lagent.utils import create_object, load_class_from_string
def default_plugin_validate(plugin: str):
plugin = plugin.strip()
if not (plugin.startswith('{') and plugin.endswith("}")):
raise json.decoder.JSONDecodeError
return json.loads(plugin)
class ToolStatusCode(IntEnum):
NO_TOOL = 0
VALID_TOOL = 1
PARSING_ERROR = -1
class ToolParser(StrParser):
def __init__(self,
tool_type: str,
template: str = '',
begin: str = '<tool>\n',
end: str = '</tool>\n',
validate: Callable[[str], Any] = None,
**kwargs):
super().__init__(template, begin=begin, end=end, **kwargs)
self.template = template
self.tool_type = tool_type
# self.pattern = re.compile(
# '(.*?){}(.*)({})?'.format(re.escape(begin), re.escape(end)),
# re.DOTALL)
self.validate = load_class_from_string(validate) if isinstance(
validate, str) else validate
def parse_response(self, data: str) -> dict:
if self.format_field['begin'] not in data:
return dict(
tool_type=None,
thought=data,
action=None,
status=ToolStatusCode.NO_TOOL)
thought, action, *_ = data.split(self.format_field["begin"])
action = action.split(self.format_field['end'])[0]
status = ToolStatusCode.VALID_TOOL
if self.validate:
try:
action = self.validate(action)
except Exception:
status = ToolStatusCode.PARSING_ERROR
return dict(
tool_type=self.tool_type,
thought=thought,
action=action,
status=status)
def format_response(self, parsed: dict) -> str:
if parsed['action'] is None:
return parsed['thought']
assert parsed['tool_type'] == self.tool_type
if isinstance(parsed['action'], dict):
action = json.dumps(parsed['action'], ensure_ascii=False)
else:
action = str(parsed['action'])
return parsed['thought'] + self.format_field[
'begin'] + action + self.format_field['end']
class InterpreterParser(ToolParser):
def __init__(self,
tool_type: str = 'interpreter',
template: str = '',
begin: str = '<|action_start|><|interpreter|>\n',
end: str = '<|action_end|>\n',
validate: Callable[[str], Any] = None,
**kwargs):
super().__init__(tool_type, template, begin, end, validate, **kwargs)
class PluginParser(ToolParser):
def __init__(self,
tool_type: str = 'plugin',
template: str = '',
begin: str = '<|action_start|><|plugin|>\n',
end: str = '<|action_end|>\n',
validate: Callable[[str], Any] = default_plugin_validate,
**kwargs):
super().__init__(tool_type, template, begin, end, validate, **kwargs)
class MixedToolParser(StrParser):
def __init__(self,
tool_type: Optional[str] = None,
template='',
parsers: List[ToolParser] = None,
**format_field):
self.parsers = {}
self.tool_type = tool_type
for parser in parsers or []:
parser = create_object(parser)
self.parsers[parser.tool_type] = parser
super().__init__(template, **format_field)
def format_instruction(self) -> List[dict]:
inst = []
content = super().format_instruction()
if content.strip():
msg = dict(role='system', content=content)
if self.tool_type:
msg['name'] = self.tool_type
inst.append(msg)
for name, parser in self.parsers.items():
content = parser.format_instruction()
if content.strip():
inst.append(dict(role='system', content=content, name=name))
return inst
def parse_response(self, data: str) -> dict:
res = dict(
tool_type=None,
thought=data,
action=None,
status=ToolStatusCode.NO_TOOL)
for name, parser in self.parsers.items():
res = parser.parse_response(data)
if res['tool_type'] == name:
break
return res
def format_response(self, parsed: dict) -> str:
if parsed['action'] is None:
return parsed['thought']
assert parsed['tool_type'] in self.parsers
return self.parsers[parsed['tool_type']].format_response(parsed)
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