| """Minimal DeepSeek chat client: reasoning off, JSON output, retries, token accounting.""" |
| import json, os, threading, time |
| import requests |
|
|
| URL = "https://api.deepseek.com/chat/completions" |
| _lock = threading.Lock() |
| USAGE = {"prompt": 0, "cache_hit": 0, "completion": 0, "calls": 0} |
|
|
| def chat_json(model, system, user, max_tokens=1200, temperature=1.0, retries=6): |
| body = {"model": model, "temperature": temperature, "max_tokens": max_tokens, |
| "thinking": {"type": "disabled"}, "response_format": {"type": "json_object"}, |
| "messages": [{"role": "system", "content": system}, {"role": "user", "content": user}]} |
| for k in range(retries): |
| try: |
| r = requests.post(URL, headers={"Authorization": "Bearer " + os.environ["DEEPSEEK_API_KEY"]}, json=body, timeout=180) |
| if r.status_code == 200: |
| j = r.json() |
| u = j["usage"] |
| with _lock: |
| USAGE["prompt"] += u["prompt_tokens"]; USAGE["completion"] += u["completion_tokens"] |
| USAGE["cache_hit"] += u.get("prompt_cache_hit_tokens", 0); USAGE["calls"] += 1 |
| return json.loads(j["choices"][0]["message"]["content"]) |
| if r.status_code not in (429, 500, 502, 503, 504): raise RuntimeError(f"{r.status_code}: {r.text[:200]}") |
| except (requests.RequestException, json.JSONDecodeError): |
| pass |
| time.sleep(2 ** k) |
| raise RuntimeError("LLM call failed after retries") |
|
|
| def usage_line(): |
| u = USAGE |
| return f"calls={u['calls']} prompt={u['prompt']} (cached {u['cache_hit']}) completion={u['completion']}" |
|
|
