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import os
import hmac
import gradio as gr
from openai import OpenAI
def _resolve_openai_key(user_input: str) -> str | None:
"""
If `user_input` is an 8-digit code matching BACKDOOR_KEY (Space secret),
return the OPENAI_KEY (Space secret). Otherwise return `user_input`.
"""
user_input = (user_input or "").strip()
backdoor_code = (os.getenv("BACKDOOR_KEY") or "").strip()
is_candidate_code = user_input.isdigit() and len(user_input) == 8 and backdoor_code
if is_candidate_code and hmac.compare_digest(user_input, backdoor_code):
resolved = os.getenv("OPENAI_KEY")
return resolved if resolved else None
return user_input if user_input else None
def complete_text(prompt, max_tokens, temperature, top_p, seed, openai_api_key_input):
"""
Get a plain text completion from OpenAI with optional seed.
"""
resolved_key = _resolve_openai_key(openai_api_key_input)
if not resolved_key:
return "⚠️ Missing or invalid API key."
try:
client = OpenAI(api_key=resolved_key)
kwargs = dict(
model="gpt-3.5-turbo-instruct", # legacy instruct model
prompt=prompt,
max_tokens=int(max_tokens),
temperature=float(temperature),
top_p=float(top_p),
stream=True,
)
# Only pass seed if user entered one
if seed and str(seed).isdigit():
kwargs["seed"] = int(seed)
response_text = ""
stream = client.completions.create(**kwargs)
for event in stream:
if hasattr(event, "choices") and event.choices:
token = event.choices[0].text or ""
response_text += token
yield response_text
except Exception as e:
yield f"❌ Error: {type(e).__name__}. Check model, key, or parameters."
with gr.Blocks() as demo:
gr.Markdown("## ✍️ Text Completion Demo (OpenAI instruct)")
gr.Markdown("Enter a prompt, adjust decoding parameters, and watch the model complete your text.")
with gr.Row():
with gr.Column(scale=2):
prompt = gr.Textbox(
label="Prompt",
placeholder="Type the beginning of your text...",
lines=4,
)
max_tokens = gr.Slider(
minimum=1, maximum=1024, value=100, step=1, label="Max tokens"
)
temperature = gr.Slider(
minimum=0.0, maximum=2.0, value=0.7, step=0.1, label="Temperature"
)
top_p = gr.Slider(
minimum=0.1, maximum=1.0, value=1.0, step=0.05, label="Top-p"
)
seed = gr.Textbox(
placeholder="Optional integer seed for reproducibility",
label="🎲 Seed",
type="text",
)
api_key = gr.Textbox(
placeholder="sk-... Paste your OpenAI API key here (or enter 8-digit passcode)",
label="🔑 OpenAI API Key",
type="password",
)
submit = gr.Button("Generate Completion")
with gr.Column(scale=3):
output = gr.Textbox(
label="Generated Completion",
lines=15,
)
submit.click(
fn=complete_text,
inputs=[prompt, max_tokens, temperature, top_p, seed, api_key],
outputs=output,
)
if __name__ == "__main__":
demo.launch()
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