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nodes.py
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nodes.py
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import json
import random
import time
from langchain_core.messages import AIMessage, HumanMessage
_delay = 1
def update_entity_node(state, agent):
global _delay
temp_state = state
retries = 5
while True:
print("Input: ", temp_state["messages"])
print("--------------------------------------------------------------------")
time.sleep(random.random() * _delay)
result = agent.invoke(temp_state["messages"])
try:
if result.content == '':
#raise ValueError('Empty response from agent')
# if retries == 0:
# raise ValueError('Max retries reached')
# retries -= 1
# print(f'Empty response from agent,waiting {_delay} seconds before retrying...')
# _delay *= 2
# time.sleep(_delay)
# print(f'Retrying... retries left: {retries}')
# continue
# Not retrying empty responses
retries = 0
raise ValueError('Empty response from agent')
break
except Exception as e:
if retries == 0:
raise ValueError('Max retries reached')
retries -= 1
print(f'Error trying to parse output, Error: {e}, Output: {result.content}, waiting for {_delay} seconds, retrying... retries left: {retries}')
# update agent state with error message and try again
temp_state['messages'].append(AIMessage(content=result.content))
temp_state['messages'].append(HumanMessage(content=f'Error trying to parse output - {e}'))
_delay *= 2
time.sleep(_delay)
continue
print("Output: ", result.content)
print(
"--------------------------------------------------------------------")
return {
"messages": [result.content]
}
def input_node(state, agent):
global _delay
temp_state = state
approved = None
retries = 5
while True:
print("Input: ", temp_state["messages"])
print("--------------------------------------------------------------------")
time.sleep(random.random() * _delay)
result = agent.invoke(temp_state["messages"])
try:
if result.content == '':
#raise ValueError('Empty response from agent')
# if retries == 0:
# raise ValueError('Max retries reached')
# retries -= 1
# print(f'Empty response from agent,waiting {_delay} seconds before retrying...')
# _delay *= 2
# time.sleep(_delay)
# print(f'Retrying... retries left: {retries}')
# continue
retries = 0
raise ValueError('Empty response from agent')
if 'APPROVED' in result.content:
approved = True
elif 'REJECTED' in result.content:
approved = False
else:
raise ValueError('Approval status not found in output, please include either APPROVED or REJECTED in the output')
break
except Exception as e:
if retries == 0:
raise ValueError('Max retries reached')
retries -= 1
print(f'Error trying to parse output, Error: {e}, Output: {result.content}, waiting for {_delay} seconds, retrying... retries left: {retries}')
# update agent state with error message and try again
temp_state['messages'].append(AIMessage(content=result.content))
temp_state['messages'].append(HumanMessage(content=f'Error trying to parse output - {e}'))
_delay *= 2
time.sleep(_delay)
continue
print("Output: ", result.content)
print(
"--------------------------------------------------------------------")
return {
"messages": [result.content],
"approved": approved
}
def output_node(state, agent):
return {"output": state["output"]}
def output_json_node(state, agent):
global _delay
temp_state = state
output = None
retries = 5
while True:
time.sleep(random.random() * _delay)
result = agent.invoke(temp_state["messages"])
try:
if result.content == '':
#raise ValueError('Empty response from agent')
# if retries == 0:
# raise ValueError('Max retries reached')
# retries -= 1
# print(f'Empty response from agent,waiting {_delay} seconds before retrying...')
# _delay *= 2
# time.sleep(_delay)
# print(f'Retrying... retries left: {retries}')
# continue
retries = 0
raise ValueError('Empty response from agent')
output = json.loads(result.content.replace('json', '').replace('`', ''))
break
except Exception as e:
if retries == 0:
raise ValueError('Max retries reached')
retries -= 1
print(f'Error trying to parse output, Error: {e}, output should be json format without any additional text our output so do not explain what you did different in this response just output the json by itself. Wrong Output: {result.content}, waiting for {_delay} seconds, retrying... retries left: {retries}')
# update agent state with error message and try again
# TODO - test if better too retry without appending the error message
temp_state['messages'].append(AIMessage(content=result.content))
temp_state['messages'].append(HumanMessage(content=f'Error trying to parse json output, please try again, error: {e}'))
_delay *= 2
time.sleep(_delay)
continue
print("JSON Output: ", json.dumps(output, indent=4))
print(
"--------------------------------------------------------------------")
return {
"output": output
}