Second execution of `.earnings_history` gives error because code doesn't use `is not None`

[furas]

This code gives error when earnings_history is executed second time

import yfinance

item = yfinance.Ticker('HD')

print(item.earnings_history)   # OK

print(item.earnings_history)   # ERROR

Traceback (most recent call last):
  File "/home/furas/Pulpit/PYTHON - SO/2022.08.20 - yfinance - ipdb/main.py", line 20, in <module>
    print(yahoo_stock_obj.earnings_history)
  File "/usr/local/lib/python3.10/dist-packages/yfinance/ticker.py", line 217, in earnings_history
    return self.get_earnings_history()
  File "/usr/local/lib/python3.10/dist-packages/yfinance/base.py", line 901, in get_earnings_history
    if self._earnings_history:
  File "/usr/local/lib/python3.10/dist-packages/pandas/core/generic.py", line 1527, in __nonzero__
    raise ValueError(
ValueError: The truth value of a DataFrame is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

I think all problem is in function get_earnings_history() in line

https://github.com/ranaroussi/yfinance/blob/main/yfinance/base.py#L901

because it doesn't use is not None to check it

if self._earnings_history is not None:

Similar line https://github.com/ranaroussi/yfinance/blob/main/yfinance/base.py#L820 in function get_earnings_history() has is not None

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BTW:

I found this problem when I tried to resolve problem on Stackoverflow:
python - how to access and manipulate rows from pandas dataframe in yahoo finance api - Stack Overflow

[ValueRaider]

earnings_history is fundamentally broken, should never have been merged into main. Use Ticker.earnings_dates instead.