refactor(yahoo): keep what every Yahoo request shares in yahoo.common

- yf_retry, raise_for_empty and YAHOO_HOST move from yahoo.ohlcv, which the news, fundamentals and market modules imported them from

tests/test_fundamentals_lookahead.py

@@ -129,9 +129,9 @@ class TestNoUsableFieldsStillRaises:
         # yfinance returns {"trailingPegRatio": None} for unknown symbols; on a
         # live run that must stay a hard "no data", not a bare header.
         from tradingagents.dataflows.errors import NoMarketDataError
-        from tradingagents.dataflows.vendors.yahoo import ohlcv
+        from tradingagents.dataflows.vendors.yahoo import common
 
-        monkeypatch.setattr(ohlcv, "vendor_reachable", lambda url: True)
+        monkeypatch.setattr(common, "vendor_reachable", lambda url: True)
 
         with pytest.raises(NoMarketDataError):
             _yf(_TODAY, info={"trailingPegRatio": None})

tests/test_no_data_handling.py

@@ -17,7 +17,7 @@ import pytest
 from tradingagents.dataflows import router
 from tradingagents.dataflows.config import set_config
 from tradingagents.dataflows.errors import NoMarketDataError
-from tradingagents.dataflows.vendors.yahoo import ohlcv
+from tradingagents.dataflows.vendors.yahoo import common, ohlcv
 
 
 @pytest.mark.unit
@@ -35,7 +35,7 @@ class TestLoadOhlcvNoPoison(unittest.TestCase):
     def test_empty_download_raises_and_does_not_cache(self):
         empty = mock.Mock(history=mock.Mock(return_value=pd.DataFrame()))
         # Yahoo answers, so an empty download means the symbol has no data.
-        reachable = mock.patch.object(ohlcv, "vendor_reachable", return_value=True)
+        reachable = mock.patch.object(common, "vendor_reachable", return_value=True)
         reachable.start()
         self.addCleanup(reachable.stop)
         with mock.patch.object(ohlcv.yf, "Ticker", return_value=empty), \

tests/test_undated_tools_as_of.py

@@ -200,16 +200,16 @@ def test_an_unreachable_vendor_is_not_reported_as_a_missing_symbol(monkeypatch):
     import pandas as pd
 
     from tradingagents.dataflows.errors import NoMarketDataError, VendorUnavailableError
-    from tradingagents.dataflows.vendors.yahoo import ohlcv
+    from tradingagents.dataflows.vendors.yahoo import common
 
     empty = mock.Mock(quarterly_balance_sheet=pd.DataFrame(), balance_sheet=pd.DataFrame())
     monkeypatch.setattr(yahoo_market.yf, "Ticker", lambda s: empty)
 
-    monkeypatch.setattr(ohlcv, "vendor_reachable", lambda url: False)
+    monkeypatch.setattr(common, "vendor_reachable", lambda url: False)
     with pytest.raises(VendorUnavailableError, match="unreachable"):
         yahoo_fundamentals.get_balance_sheet("AAPL", "annual", get_current_date())
 
-    monkeypatch.setattr(ohlcv, "vendor_reachable", lambda url: True)
+    monkeypatch.setattr(common, "vendor_reachable", lambda url: True)
     with pytest.raises(NoMarketDataError):
         yahoo_fundamentals.get_balance_sheet("AAPL", "annual", get_current_date())
 
@@ -241,15 +241,15 @@ def test_the_price_path_also_tells_an_outage_from_an_unknown_symbol(monkeypatch)
     import pandas as pd
 
     from tradingagents.dataflows.errors import NoMarketDataError, VendorUnavailableError
-    from tradingagents.dataflows.vendors.yahoo import ohlcv
+    from tradingagents.dataflows.vendors.yahoo import common
 
     monkeypatch.setattr(yahoo_market.yf, "Ticker", lambda s: mock.Mock(history=lambda **k: pd.DataFrame()))
 
-    monkeypatch.setattr(ohlcv, "vendor_reachable", lambda url: False)
+    monkeypatch.setattr(common, "vendor_reachable", lambda url: False)
     with pytest.raises(VendorUnavailableError, match="unreachable"):
         yahoo_market.get_YFin_data_online("AAPL", "2026-09-01", "2026-09-10")
 
-    monkeypatch.setattr(ohlcv, "vendor_reachable", lambda url: True)
+    monkeypatch.setattr(common, "vendor_reachable", lambda url: True)
     with pytest.raises(NoMarketDataError):
         yahoo_market.get_YFin_data_online("AAPL", "2026-09-01", "2026-09-10")
 

tests/test_yahoo_rate_limit.py

@@ -22,7 +22,7 @@ from tradingagents.agents.tools import (
 from tradingagents.dataflows import router
 from tradingagents.dataflows.config import set_config
 from tradingagents.dataflows.errors import VendorUnavailableError
-from tradingagents.dataflows.vendors.yahoo import fundamentals, ohlcv
+from tradingagents.dataflows.vendors.yahoo import common, fundamentals, ohlcv
 
 DAY = "2026-09-18"
 
@@ -34,8 +34,8 @@ def _rate_limited(*args, **kwargs):
 @pytest.fixture
 def yahoo(monkeypatch, tmp_path):
     set_config({"data_cache_dir": str(tmp_path)})
-    monkeypatch.setattr(ohlcv.time, "sleep", lambda seconds: None)
-    for module in (ohlcv, fundamentals):
+    monkeypatch.setattr(common.time, "sleep", lambda seconds: None)
+    for module in (common, fundamentals):
         monkeypatch.setattr(module, "vendor_reachable", lambda url: True)
     return monkeypatch
 
@@ -121,7 +121,7 @@ def test_a_price_request_that_raises_is_unavailable_whether_or_not_yahoo_answers
 
     yahoo.setattr(yf.Ticker, "history", refused)
     for reachable in (False, True):
-        yahoo.setattr(ohlcv, "vendor_reachable", lambda url, _r=reachable: _r)
+        yahoo.setattr(common, "vendor_reachable", lambda url, _r=reachable: _r)
         with pytest.raises(VendorUnavailableError, match="request failed"):
             ohlcv.load_ohlcv("AAPL", DAY)
 
@@ -134,7 +134,7 @@ def test_a_price_request_that_fails_is_unavailable_even_when_yahoo_answers(monke
 
     monkeypatch.setattr(ohlcv, "get_config", lambda: {"data_cache_dir": str(tmp_path)})
     monkeypatch.setattr(ohlcv.yf, "Ticker", lambda s: type("T", (), {"history": lambda self, **k: timed_out(**k)})())
-    monkeypatch.setattr(ohlcv, "vendor_reachable", lambda url: True)
+    monkeypatch.setattr(common, "vendor_reachable", lambda url: True)
 
     with pytest.raises(VendorUnavailableError):
         ohlcv.load_ohlcv("NVDA", "2026-09-23")