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"""A 股代码归一化。支持 6 位纯数字或带交易所后缀(000001 / 000001.SZ)。"""
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from __future__ import annotations
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# 场内 ETF 代码前缀(与股票区间不重叠):沪 51/56/58 开头、深 159 开头。
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# 50/57/16 开头是 LOF,不在此列。
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_ETF_PREFIXES = ("51", "56", "58", "159")
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def plain_code(code: str) -> str:
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"""000001.SZ -> 000001"""
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return code.strip().upper().split(".")[0]
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def is_etf_symbol(code: str) -> bool:
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"""按 6 位纯代码前缀判断是否场内 ETF(fetcher 据此路由到东财数据源)。"""
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c = plain_code(code)
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return len(c) == 6 and c.startswith(_ETF_PREFIXES)
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def to_ts_code(code: str) -> str:
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"""转 Tushare ts_code(带交易所后缀)。"""
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c = code.strip().upper()
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if "." in c:
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return c
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c = plain_code(c)
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# 沪市:60xxxx 主板、68xxxx 科创、9xxxxx B 股
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if c.startswith(("60", "68", "9")):
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# 沪市:60xxxx 主板、68xxxx 科创、9xxxxx B 股、5xxxxx 基金(51/56/58 场内 ETF)
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if c.startswith(("60", "68", "9", "51", "56", "58")):
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return c + ".SH"
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# 深市:00xxxx 主板/中小、30xxxx 创业、20xxxx B 股
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if c.startswith(("00", "30", "20")):
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# 深市:00xxxx 主板/中小、30xxxx 创业、20xxxx B 股、159xxx 场内 ETF
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if c.startswith(("00", "30", "20", "159")):
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return c + ".SZ"
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# 北交所:8xxxxx / 4xxxxx
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if c.startswith(("8", "4")):
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