从 Tushare 迁移到 ashareapi

# Tushare                              # 我们
# 600667.SH   →   sh600667
# 000001.SZ   →   sz000001
# 830799.BJ   →   bj830799
# 00700.HK    →   hk00700
# AAPL        →   usAAPL

# 一行转换（Python）
def to_code(ts_code: str) -> str:
    """600667.SH → sh600667（A股）· 00700.HK → hk00700 · AAPL → usAAPL"""
    if "." not in ts_code:
        return "us" + ts_code.upper()
    num, mkt = ts_code.split(".")
    return {"SH": "sh", "SZ": "sz", "BJ": "bj", "HK": "hk"}[mkt] + num

# Tushare
#   pro.daily(ts_code="600667.SH", start_date="20260101", end_date="20260921")
# 我们（无区间参数：取最近 N 根，回来自己按 date 过滤）
curl "https://api.ashareapi.com/v1/kline?code=sh600667&period=day&count=30"

{
  "ok": true, "endpoint": "kline", "tier": "free",
  "elapsed_ms": 615, "source": "multi",
  "data": [
    {"date": "2026-09-21", "open": "20.64", "last": "20.30",
     "high": "20.78", "low": "20.12",
     "volume": "2213526",      // 手（与 Tushare vol 同为手）
     "amount": "4510589168",   // 元
     "turnover": "10.58"}      // 换手率（%）
  ]
}

import requests

BASE = "https://api.ashareapi.com/v1"
H = {}                                   # 免费端点：无需 Key
# 付费端点加上（推荐请求头，密钥不进日志）：
# H = {"Authorization": "Bearer ct-你的Key"}

def get(path: str, **params):
    r = requests.get(f"{BASE}/{path}", params=params, headers=H, timeout=30)
    if r.status_code == 429:             # 匿名 5 次/分；解一次 PoW 挑战可到 60 次/分
        raise RuntimeError("rate limited — 降频，或见 /v1/challenge")
    r.raise_for_status()
    body = r.json()
    if not body.get("ok"):
        raise RuntimeError(f"upstream failed (not counted): {body}")
    return body["data"]