Error in loading history file - TypeError: unsupported operand type(s) for +: 'NoneType' and 'datetime.timedelta'

[codejoey]

Has anyone been able to load a history file?

Tried following the instructions to load history file.

""

Step 2. Loading a History File

Then, when prompted with "Enter option: ", you should load the agent history by responding with the following command:

call -- load history the_ville/<history_file_name>.csv

Note that you will need to replace <history_file_name> with the name of an existing history file. There are two history files included in the repo as examples: agent_history_init_n25.csv for base_the_ville_n25 and agent_history_init_n3.csv for base_the_ville_isabella_maria_klaus. These files include semicolon-separated lists of memory records for each of the agents—loading them will insert the memory records into the agents' memory stream. " "

Issue

After I provided call -- load history the_ville/agent_history_init_n3_sxsw.csv to "Enter option" prompt in terminal, I got this:

Enter option: call -- load history the_ville/agent_history_init_n3_sxsw.csv
=== persona/prompt_template/v2/whisper_inner_thought_v1.txt
~~~ persona    ---------------------------------------------------
Maria Lopez 

~~~ gpt_param ----------------------------------------------------
{'engine': 'text-davinci-003', 'max_tokens': 50, 'temperature': 0, 'top_p': 1, 'stream': False, 'frequency_penalty': 0, 'presence_penalty': 0, 'stop': None} 

~~~ prompt_input    ----------------------------------------------
['Maria Lopez', 'This is very important -- you have a secret crush on Klaus Mueller'] 

~~~ prompt    ----------------------------------------------------
Translate the following thought into a statement about Maria Lopez. 

Thought: "This is very important -- you have a secret crush on Klaus Mueller"
Statement: " 

~~~ output    ----------------------------------------------------
Maria Lopez has a secret crush on Klaus Mueller. 

=== END ==========================================================


**Traceback (most recent call last):
  File "/Users/Joey/github/cheonjae/reverie/backend_server/reverie.py", line 597, in open_server
    load_history_via_whisper(self.personas, clean_whispers)
  File "/Users/Joey/github/cheonjae/reverie/backend_server/persona/cognitive_modules/converse.py", line 250, in load_history_via_whisper
    expiration = persona.scratch.curr_time + datetime.timedelta(days=30)
TypeError: unsupported operand type(s) for +: 'NoneType' and 'datetime.timedelta'
Error.**

Debug attempt

I tried debugging it. In my custom history file at "environment/frontend_server/storage/demo_sxsw_the_ville_isabella_maria_klaus/personas/Maria Lopez/bootstrap_memory/scratch.json"

{
  "vision_r": 8, 
  "att_bandwidth": 8, 
  "retention": 8, 
  **"curr_time": null,** 
  "curr_tile": null, 
  "daily_plan_req": "Maria Lopez spends at least 3 hours a day Twitch streaming or gaming.", 
  "name": "Maria Lopez", 

I notice that curr_time is null, and it could be erroring on trying to combine a null value and a datatime datatype. So I tried replacing curr_time with curr_time": "February 13, 2023, 00:00:00", referencing how it is done in "environment/frontend_server/storage/base_the_ville_isabella_maria_klaus/reverie/meta.json"

Still the same error.

Perhaps the issue lies elsewhere to fix.

Any thoughts or solutions?

[senecobis]

I have experienced the very same error when starting the simulation and doing call -- load history directly. I think the issue resides in the fact that "personas" object has absolute time not initialized. A possible workaround that worked for me is to run the simulation for 1 single step run 1 and then call -- load history .

[codejoey]

I assume you mean run simulation for 1 single step, and then try call -- load history. I'll try, cheers!

[user074]

Okay I solved it by adding following lines in reverie.py file:

for persona_name, persona in self.personas.items(): 
            persona.scratch.curr_time = self.curr_time

right before the line load_history_via_whisper(self.personas, clean_whispers) on line 591 of the generative_agents/reverie/backend_server/reverie.py

So it looks like:

          for persona_name, persona in self.personas.items(): 
            persona.scratch.curr_time = self.curr_time
            
          load_history_via_whisper(self.personas, clean_whispers)