Incorrect output for YFxxx exceptions

[detlefm]

Describe bug

For YFxxx exceptions the output is:

1 Failed download:
['QUATSCH']: YFPricesMissingError('$%ticker%: possibly delisted; no price data found  (period=1d) (Yahoo error = "No data found, symbol may be delisted")')

I suspect the intended output is

1 Failed download:
YFPricesMissingError('$['QUATSCH']: possibly delisted; no price data found  (period=1d) (Yahoo error = "No data found, symbol may be delisted")')

The error is in multi.py, function download
instead of

for err in errors.keys():
    logger.error(f'{errors[err]}: ' + err)

it should be

for err in errors.keys():
    logger.error(err.replace('%ticker%',errors[err])

Simple code that reproduces your problem

import yfinance as yf

df = yf.download(tickers=["MSF.DE", "QUATSCH"], period="1d", progress=False)

Debug log

DEBUG Entering download()
DEBUG Disabling multithreading because DEBUG logging enabled
DEBUG Entering history()
DEBUG Entering history()
DEBUG MSF.DE: Yahoo GET parameters: {'range': '1d', 'interval': '1d', 'includePrePost': False, 'events': 'div,splits,capitalGains'}
DEBUG Entering get()
DEBUG Entering _make_request()
DEBUG url=https://query2.finance.yahoo.com/v8/finance/chart/MSF.DE
DEBUG params={'range': '1d', 'interval': '1d', 'includePrePost': False, 'events': 'div,splits,capitalGains'}
DEBUG Entering _get_cookie_and_crumb()
DEBUG cookie_mode = 'basic'
DEBUG Entering _get_cookie_and_crumb_basic()
DEBUG loaded persistent cookie
DEBUG reusing cookie
DEBUG crumb = '0DlVzIFi41Z'
DEBUG Exiting _get_cookie_and_crumb_basic()
DEBUG Exiting _get_cookie_and_crumb()
DEBUG response code=200
DEBUG Exiting _make_request()
DEBUG Exiting get()
DEBUG MSF.DE: yfinance received OHLC data: 2025-01-31 16:36:23 only
DEBUG MSF.DE: OHLC after cleaning: 2025-01-31 17:36:23+01:00 only
DEBUG MSF.DE: OHLC after combining events: 2025-01-31 00:00:00+01:00 only
DEBUG MSF.DE: yfinance returning OHLC: 2025-01-31 00:00:00+01:00 only
DEBUG Exiting history()
DEBUG Exiting history()
DEBUG Entering history()
DEBUG Entering _fetch_ticker_tz()
DEBUG Entering get()
DEBUG Entering _make_request()
DEBUG url=https://query2.finance.yahoo.com/v8/finance/chart/QUATSCH
DEBUG params=frozendict.frozendict({'range': '1d', 'interval': '1d'})
DEBUG Entering _get_cookie_and_crumb()
DEBUG cookie_mode = 'basic'
DEBUG Entering _get_cookie_and_crumb_basic()
DEBUG reusing cookie
DEBUG reusing crumb
DEBUG Exiting _get_cookie_and_crumb_basic()
DEBUG Exiting _get_cookie_and_crumb()
DEBUG response code=404
DEBUG toggling cookie strategy basic -> csrf
DEBUG Entering _get_cookie_and_crumb()
DEBUG cookie_mode = 'csrf'
DEBUG Entering _get_crumb_csrf()
DEBUG loaded persistent cookie
DEBUG Failed to find "csrfToken" in response
DEBUG Exiting _get_crumb_csrf()
DEBUG toggling cookie strategy csrf -> basic
DEBUG Entering _get_cookie_and_crumb_basic()
DEBUG loaded persistent cookie
DEBUG reusing cookie
DEBUG crumb = '0DlVzIFi41Z'
DEBUG Exiting _get_cookie_and_crumb_basic()
DEBUG Exiting _get_cookie_and_crumb()
DEBUG response code=404
DEBUG Exiting _make_request()
DEBUG Exiting get()
DEBUG Got error from yahoo api for ticker QUATSCH, Error: {'code': 'Not Found', 'description': 'No data found, symbol may be delisted'}
DEBUG Exiting _fetch_ticker_tz()
DEBUG Entering history()
DEBUG QUATSCH: Yahoo GET parameters: {'range': '1d', 'interval': '1d', 'includePrePost': False, 'events': 'div,splits,capitalGains'}
DEBUG Entering get()
DEBUG Entering _make_request()
DEBUG url=https://query2.finance.yahoo.com/v8/finance/chart/QUATSCH
DEBUG params={'range': '1d', 'interval': '1d', 'includePrePost': False, 'events': 'div,splits,capitalGains'}
DEBUG Entering _get_cookie_and_crumb()
DEBUG cookie_mode = 'basic'
DEBUG Entering _get_cookie_and_crumb_basic()
DEBUG reusing cookie
DEBUG reusing crumb
DEBUG Exiting _get_cookie_and_crumb_basic()
DEBUG Exiting _get_cookie_and_crumb()
DEBUG response code=404
DEBUG toggling cookie strategy basic -> csrf
DEBUG Entering _get_cookie_and_crumb()
DEBUG cookie_mode = 'csrf'
DEBUG Entering _get_crumb_csrf()
DEBUG loaded persistent cookie
DEBUG Failed to find "csrfToken" in response
DEBUG Exiting _get_crumb_csrf()
DEBUG toggling cookie strategy csrf -> basic
DEBUG Entering _get_cookie_and_crumb_basic()
DEBUG loaded persistent cookie
DEBUG reusing cookie
DEBUG crumb = '0DlVzIFi41Z'
DEBUG Exiting _get_cookie_and_crumb_basic()
DEBUG Exiting _get_cookie_and_crumb()
DEBUG response code=404
DEBUG Exiting _make_request()
DEBUG Exiting get()
ERROR
1 Failed download:
ERROR ['QUATSCH']: YFPricesMissingError('$%ticker%: possibly delisted; no price data found (period=1d) (Yahoo error = "No data found, symbol may be delisted")')
DEBUG ['QUATSCH']: Traceback (most recent call last):
File "C:\Users\meyer\Projects\Github\Current\meindepot.venv\Lib\site-packages\yfinance\multi.py", line 272, in _download_one
data = Ticker(ticker).history(
^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\meyer\Projects\Github\Current\meindepot.venv\Lib\site-packages\yfinance\utils.py", line 104, in wrapper
result = func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\meyer\Projects\Github\Current\meindepot.venv\Lib\site-packages\yfinance\base.py", line 81, in history
return self._lazy_load_price_history().history(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\meyer\Projects\Github\Current\meindepot.venv\Lib\site-packages\yfinance\utils.py", line 104, in wrapper
result = func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\meyer\Projects\Github\Current\meindepot.venv\Lib\site-packages\yfinance\scrapers\history.py", line 245, in history
raise _exception
yfinance.exceptions.YFPricesMissingError: $%ticker%: possibly delisted; no price data found (period=1d) (Yahoo error = "No data found, symbol may be delisted")

DEBUG Exiting download()

Bad data proof

No bad data

yfinance version

0.2.52

Python version

3.12.8

Operating system

Windows 11

[ValueRaider]

It makes more sense when multiple tickers are invalid:

>>> yf.download(tickers=["MSF.DE", "QUATSCH", 'QUATSCH1'], period="1d", progress=False)

2 Failed downloads:
['QUATSCH', 'QUATSCH1']: YFPricesMissingError('$%ticker%: possibly delisted; no price data found  (period=1d) (Yahoo error = "No data found, symbol may be delisted")')

It's grouping tickers with the same error. Maybe the $%ticker%: part is redundant.

[detlefm]

Sorry, but that's not my point. A few lines before, the placeholder %ticker% is introduced. And it is not filled, but the list is written in front of the actual log entry with the description of the requested tickers and the problem.
If '$%ticker' were not there, it might make sense - to me, it looks like an oversight.
I would expect:

['QUATSCH', 'QUATSCH1']: YFPricesMissingError( possibly delisted; no price data found (period=1d) (Yahoo error = "No data found, symbol may be delisted")')
or
YFPricesMissingError('[QUATSCH', 'QUATSCH1'], possibly delisted; no price data found (period=1d) (Yahoo error = "No data found, symbol may be delisted")')
But if that was the intention - OK.