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#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p "python3.withPackages (pkgs: with pkgs; [ keras pytorch transformers ])"
"""GPT adventure is a text-adventure style game powered by AI."""
import argparse
import shutil
import sys
import transformers
def generate(model: transformers.TextGenerationPipeline, prompt: str, **kwargs) -> str:
"""Generate text from a text generator."""
out = model(
prompt,
do_sample=True,
temperature=0.9,
top_k=60,
top_p=0.9,
return_full_text=False,
**kwargs,
)[0]["generated_text"]
first_line = out.split("\n", 1)[0].strip()
if first_line:
return first_line
return "haha i'm not sure what you mean"
def load_model(model: str) -> transformers.TextGenerationPipeline:
"""Load a model by name."""
tokenizer = transformers.AutoTokenizer.from_pretrained(model)
return transformers.pipeline(
"text-generation",
tokenizer=tokenizer,
model=transformers.AutoModelForCausalLM.from_pretrained(model),
pad_token_id=tokenizer.eos_token_id,
)
class Persona:
def __init__(self, name: str, bio: str):
self.name = name
self.bio = bio
self.prologue = f"{name}'s Persona: {bio}\n<START>\n"
class State:
def __init__(self, persona: Persona, history: str):
self.persona = persona
self.history = history
self.prev_response_length = 0
def add_history(self, who: str, msg: str) -> None:
fmt_msg = f"{who}: {msg}\n"
self.history += fmt_msg
self.prev_response_length = len(fmt_msg)
def rollback_history(self) -> None:
self.history = self.history[:-self.prev_response_length]
self.prev_response_length = 0
def prompt(self) -> str:
max_prompt_size = 10000
if len(self.history) > max_prompt_size:
self.history = self.history[-(max_prompt_size+1):].split("\n", 1)[1]
return f"{self.persona.prologue}{self.history}{self.persona.name}: "
def save(self, filename: str) -> None:
with open(filename, "w") as f:
print(self.persona.name, file=f)
print(self.persona.bio, file=f)
print(self.history, file=f, end='')
def load(filename: str) -> State:
with open(filename, "r") as f:
persona = f.readline().strip()
bio = f.readline().strip()
history = f.read()
return State(Persona(persona, bio), history)
def wrap(message: str) -> str:
"""Wrap long lines to terminal width characters."""
width = shutil.get_terminal_size().columns
res = []
for line in message.split("\n"):
if len(line) < width:
res.append(line)
continue
split_line = []
for word in line.split(" "):
if not split_line or len(" ".join(split_line)) + len(word) < width:
split_line.append(word)
continue
res.append(" ".join(split_line))
split_line = [word]
res.append(" ".join(split_line))
return "\n".join(res)
class Term:
def __init__(self):
self.rewind_point = 0
def input(self, prompt: str) -> str:
self.rewind_point += 1
return input(prompt)
def print(self, msg: str) -> None:
wrapped_msg = wrap(msg)
print(wrapped_msg)
self.rewind_point += wrapped_msg.count("\n") + 1
def set_rewind_point(self) -> None:
self.rewind_point = 0
def rewind(self) -> None:
print(f"\033[{self.rewind_point}A\033[J\r", end="")
self.set_rewind_point()
flavors = (
State(Persona("Rin",
"Tohsaka Rin is a feisty and independent mage who can come across as "
"rude and unlikeable at first. She can be sweet and caring, but it "
"takes a lot to break down her guard."),
"Rin: What are you looking at... idiot?\n"
"You: Umm nothing...\n"
"Rin: That's right, you're nothing. You are less than a piece of trash.\n"
"You: Rin, do you want to go demon-hunting some time?\n"
"Rin: Well, maybe. But not because I like you or anything.\n"
"You: Right, we'll just go as friends.\n"
"Rin: Or maybe acquaintances...\n"
),
)
def pick_flavor() -> State:
"""Query the user for what scenario they want to play."""
for i, state in enumerate(flavors):
print(f"{i}.\t{state.persona.name}")
print(f"{len(flavors)}.\tcustom")
while True:
choice = input("Choose a persona: ")
try:
choice_int = int(choice)
except ValueError:
print("Input must be an integer.")
continue
if choice_int == len(flavors):
name = input("Enter your character's name: ")
bio = input("Enter your character's persona: ")
return State(Persona(name, bio), "")
try:
return flavors[choice_int]
except IndexError:
print("Index out of bounds.")
continue
def main() -> None:
"""Run the main game loop."""
parser = argparse.ArgumentParser("AI dungeon clone")
parser.add_argument("--model", default="PygmalionAI/pygmalion-6b", help="Model to use")
parser.add_argument("save_file", nargs="?", default="")
args = parser.parse_args()
model = load_model(args.model)
if args.save_file:
state = load(args.save_file)
print("\n".join(state.history.rsplit("\n", 11)[-11:]).strip())
else:
state = pick_flavor()
term = Term()
while True:
try:
msg = term.input("> ")
except EOFError:
break
if msg == "/retry":
state.rollback_history()
term.rewind()
elif msg == "/edit":
state.rollback_history()
term.rewind()
new_response = term.input("")
state.add_history(state.persona.name, new_response)
continue
elif msg.startswith("/save"):
if " " not in msg:
term.print("Usage: /save <filename>")
continue
state.save(msg.split(" ", 1)[1])
continue
else:
state.add_history("You", msg)
term.set_rewind_point()
response = generate(model, state.prompt(), max_new_tokens=50)
if not response:
response = "haha I'm not sure what you mean"
term.print(response)
state.add_history(state.persona.name, response)
main()
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