get_historical_price_data() error

[jmalbornoz]

Here's what I am trying to do:

from yahoofinancials import YahooFinancials
ticker = 'MSFT'
yahoo_financials = YahooFinancials(ticker)
data = yahoo_financials.get_historical_price_data("2024-03-01", "2024-03-26", "daily")

After a long wait of some 20 minutes I get the following error message:

---

TypeError Traceback (most recent call last)
Cell In[4], line 1
----> 1 data = yahoo_financials.get_historical_price_data("2024-03-01", "2024-03-26", "daily")

File D:\Programs\Anaconda3\envs\quant\lib\site-packages\yahoofinancials\yf.py:163, in YahooFinancials.get_historical_price_data(self, start_date, end_date, time_interval)
161 end = self.format_date(end_date)
162 hist_obj = {'start': start, 'end': end, 'interval': interval_code}
--> 163 return self.get_stock_data('history', hist_obj=hist_obj)

File D:\Programs\Anaconda3\envs\quant\lib\site-packages\yahoofinancials\data.py:631, in YahooFinanceData.get_stock_data(self, statement_type, tech_type, report_name, hist_obj)
629 if isinstance(self.ticker, str):
630 dict_ent = self._retry_create_dict_ent(self.ticker, statement_type, tech_type, report_name, hist_obj)
--> 631 data.update(dict_ent)
632 else:
633 if self.concurrent:

TypeError: 'NoneType' object is not iterable

I have tried other tickers and the result is the same.

[rhandley1231]

I've been having the same issue with this code. I'm taking a Quantitative Analytics Course and am encountering this issue when trying to retrieve data with this call.

[2021Anson2016]

Here's what I am trying to do:

from yahoofinancials import YahooFinancials
ticker = 'MSFT'
yahoo_financials = YahooFinancials(ticker)
data = yahoo_financials.get_historical_price_data("2024-03-01", "2024-03-26", "daily")

After a long wait of some 20 minutes I get the following error message:

TypeError Traceback (most recent call last) Cell In[4], line 1 ----> 1 data = yahoo_financials.get_historical_price_data("2024-03-01", "2024-03-26", "daily")

File D:\Programs\Anaconda3\envs\quant\lib\site-packages\yahoofinancials\yf.py:163, in YahooFinancials.get_historical_price_data(self, start_date, end_date, time_interval) 161 end = self.format_date(end_date) 162 hist_obj = {'start': start, 'end': end, 'interval': interval_code} --> 163 return self.get_stock_data('history', hist_obj=hist_obj)

File D:\Programs\Anaconda3\envs\quant\lib\site-packages\yahoofinancials\data.py:631, in YahooFinanceData.get_stock_data(self, statement_type, tech_type, report_name, hist_obj) 629 if isinstance(self.ticker, str): 630 dict_ent = self._retry_create_dict_ent(self.ticker, statement_type, tech_type, report_name, hist_obj) --> 631 data.update(dict_ent) 632 else: 633 if self.concurrent:

TypeError: 'NoneType' object is not iterable

I have tried other tickers and the result is the same.

I have met the same problem.

[alphaveneno]

I have encountered this same error intermittently over the last year or so, usually involving some but not all stocks. Today (Sept 28, 2024) it involves all stocks.

I can only speak to error-handling right now. Here's how I handle the error:

from kill_timeout import kill_timeout

....
try:
lastyear = self.get_price_data(financials, prev_yr, this_yr)
except TimeoutError as e:
print(f'get_price_data for {symbol} {prev_yr} could not complete within 15 seconds and was terminated\n')
logging.error(e)
....

############################ HELPER FUNCTIONS ########################################
@kill_timeout(15)
def get_price_data(self, financials, yr1, yr2):
price_data = financials.get_historical_price_data(f'{yr1}-01-01', f'{yr2}-01-01', "daily")
return price_data

I import kill_timeout and use it to decorate a helper function, which attempts the actual download, giving the application 15 seconds to complete this task. I log the error when the exception occurs, moving on to the next stock.

[alphaveneno]

There is a bug in /lib/python3.11/site-packages/yfinance/cache.py

Look at this block of code around line 374:

try: data = _CookieSchema.get(_CookieSchema.strategy == strategy) cookie = _pkl.loads(data.cookie_bytes) return {'cookie':cookie, 'age':_datetime.datetime.now()-data.fetch_date} except _CookieSchema.DoesNotExist: return None

data.fetch_date should be a datetime object, but it is actually a string. Of course you cannot subtract a string from a datetime object.

Here is my corrected version of the code:

try: data = _CookieSchema.get(_CookieSchema.strategy == strategy) datetime_object = _datetime.datetime.strptime(data.fetch_date, '%Y-%m-%dT%H:%M:%S.%f') cookie = _pkl.loads(data.cookie_bytes) return {'cookie': cookie, 'age': _datetime.datetime.now() - datetime_object} except _CookieSchema.DoesNotExist: return None