boj-ts-api

Generic Python client for the Bank of Japan Time-Series Statistics API.

Low-level, typed wrapper around the three BOJ API endpoints. For a beginner-friendly interface with domain wrappers and enum-driven filtering, see pyboj.

Installation

pip install boj-ts-api

Usage

Fetch Data by Series Code

from boj_ts_api import Client, Lang

with Client(lang=Lang.EN) as client:
    resp = client.get_data_code(
        db="CO",
        code="TK99F1000601GCQ01000",
        start_date="202401",
        end_date="202404",
    )
    for series in resp.RESULTSET:
        print(series.SERIES_CODE, series.VALUES.VALUES)

Auto-Pagination

with Client(lang=Lang.EN) as client:
    for series in client.iter_data_code(db="CO", code="TK99F1000601GCQ01000"):
        print(series.SERIES_CODE, len(series.VALUES.SURVEY_DATES), "data points")

Fetch Data by Layer

from boj_ts_api import Client, Frequency, Lang

with Client(lang=Lang.EN) as client:
    resp = client.get_data_layer(db="FM08", frequency=Frequency.D, layer="1,1")
    for series in resp.RESULTSET:
        print(series.SERIES_CODE, series.VALUES.VALUES[:5])

Metadata

with Client(lang=Lang.EN) as client:
    meta = client.get_metadata(db="FM08")
    for rec in meta.RESULTSET[:3]:
        print(rec.SERIES_CODE, rec.FREQUENCY, rec.NAME_OF_TIME_SERIES)

Async Client

import asyncio
from boj_ts_api import AsyncClient, Lang

async def main():
    async with AsyncClient(lang=Lang.EN) as client:
        resp = await client.get_data_code(db="CO", code="TK99F1000601GCQ01000")
        print(resp.RESULTSET[0].SERIES_CODE)

asyncio.run(main())

CSV Output

with Client(lang=Lang.EN) as client:
    csv_text = client.get_data_code_csv(db="CO", code="TK99F1000601GCQ01000")
    print(csv_text)

API Surface

Both Client (sync) and AsyncClient (async) expose the same methods.

License

MIT