ImportError using yf.Ticker

[Philip030601]

Hello. Hope everyone is doing well. Getting an error after upgraded yfinance today (11/28/23) with the following code %pip install yfinance --upgrade --no-cache-dir --pre.

I am using python version 3.10 and yfinance version 02.32

Error I am getting is as follows:

ImportError: cannot import name 'DO_NOT_CACHE' from 'requests_cache' (C:\Users\17147\anaconda3\envs\ib230729\Lib\site-packages\requests_cache_init_.py)

Simple code that reproduces the problem:
session = requests_cache.CachedSession('yfinance.cache')
session.headers['User-agent'] = 'my-program/1.0'
msft = yf.Ticker('msft', session=session)
msft.actions

Traceback below:

ImportError Traceback (most recent call last)
Cell In[2], line 3
1 session = requests_cache.CachedSession('yfinance.cache')
2 session.headers['User-agent'] = 'my-program/1.0'
----> 3 msft = yf.Ticker('msft', session=session)

File ~\anaconda3\envs\ib230729\Lib\site-packages\yfinance\ticker.py:34, in Ticker.init(self, ticker, session)
33 def init(self, ticker, session=None):
---> 34 super(Ticker, self).init(ticker, session=session)
35 self._expirations = {}
36 self._underlying = {}

File ~\anaconda3\envs\ib230729\Lib\site-packages\yfinance\base.py:71, in TickerBase.init(self, ticker, session)
68 if utils.is_isin(self.ticker):
69 self.ticker = utils.get_ticker_by_isin(self.ticker, None, session)
---> 71 self._data: YfData = YfData(session=session)
73 self._analysis = Analysis(self._data, ticker)
74 self._holders = Holders(self._data, ticker)

File ~\anaconda3\envs\ib230729\Lib\site-packages\yfinance\data.py:47, in SingletonMeta.call(cls, *args, **kwargs)
45 with cls._lock:
46 if cls not in cls._instances:
---> 47 instance = super().call(*args, **kwargs)
48 cls._instances[cls] = instance
49 else:

File ~\anaconda3\envs\ib230729\Lib\site-packages\yfinance\data.py:75, in YfData.init(self, session)
70 else:
71 # Is caching. This is annoying.
72 # Can't simply use a non-caching session to fetch cookie & crumb,
73 # because then the caching-session won't have cookie.
74 self._session_is_caching = True
---> 75 from requests_cache import DO_NOT_CACHE
76 self._expire_after = DO_NOT_CACHE
77 self._crumb = None

ImportError: cannot import name 'DO_NOT_CACHE' from 'requests_cache' (C:\Users\17147\anaconda3\envs\ib230729\Lib\site-packages\requests_cache_init_.py)

[ValueRaider]

What version requests_cache?

[Philip030601]

What version requests_cache?

0.4.12

[ValueRaider]

DO_NOT_CACHE must be a new feature so fix = update. Because requests_cache is optional I'm not sure how to enforce minimum version.

[Philip030601]

DO_NOT_CACHE must be a new feature so fix = update. Because requests_cache is optional I'm not sure how to enforce minimum version.

Should i download a prior version that worked? If so, which one do u recommend? Thanks

[bot-unit]

pip install requests-cache==1.1.1 yfinance==0.2.32 --upgrade --no-cache-dir
in your case:
conda update requests-cache yfinance
or just remove reuqests-cache if you don't use it

[bot-unit]

@ValueRaider
according documentation
at the file data.py on the line 200:

if self._session_is_caching:
    # get_args['expire_after'] = self._expire_after
    with self._session.cache_disabled():
        crumb_response = self._session.get(**get_args)

so you don't need import at lines 75-76

[ValueRaider]

cache_disabled() is not thread-safe. https://requests-cache.readthedocs.io/en/stable/modules/requests_cache.session.html#requests_cache.session.CachedSession.cache_disabled

[bot-unit]

So maybe use
DO_NOT_CACHE = 0x0D0E0200020704 # Per RFC 4824
instead import it

[ValueRaider]

Fix will be setting minimum version of requests_cache, possible by #1771