mcp/gene_hub.py

"""
gene_hub – resolve_gene() tries three sources in order of speed & richness.

  1. MyGene.info (v3)  – 500 QPS key tier  :contentReference[oaicite:3]{index=3}
  2. Ensembl REST      – key-less, species-agnostic  :contentReference[oaicite:4]{index=4}
  3. Open Targets GQL  – tractability & constraint  :contentReference[oaicite:5]{index=5}
"""

from mcp.mygene      import fetch_gene_info
from mcp.ensembl     import fetch_ensembl
from mcp.opentargets import fetch_ot

async def resolve_gene(symbol: str) -> dict:
    """Return first non-empty gene record; never raises."""
    for fn in (fetch_gene_info, fetch_ensembl, fetch_ot):
        try:
            data = await fn(symbol)
            if data:
                return data
        except Exception:            # network hiccup / 429 etc.
            pass
    return {}