Unskip tests with Future version pandas

[Rubtsowa]

Currently we have problem with tests: test___repr__ - https://github.com/modin-project/modin/blob/master/modin/pandas/test/test_series.py#L501 , test_dtype_empty - https://github.com/modin-project/modin/blob/master/modin/pandas/test/test_series.py#L1539 .

I found this problem when I was working on #2164.

These tests creating empty Series. Modin have default type for Series object. But currently Pandas have default type for Series float64. Therefore now tests failed.

Currently version pandas have next DeprecationWarning:
DeprecationWarning: The default dtype for empty Series will be 'object' instead of 'float64' in a future version. Specify a dtype explicitly to silence this warning.

More details about this you can see here: https://pandas.pydata.org/pandas-docs/stable/whatsnew/v1.0.0.html

Therefore tests will be passed after new version Pandas.

[YarShev]

@Rubtsowa , I am not sure that I understand the issue. Example:

import pandas
import modin.pandas as pd
ps = pandas.Series()
Series([], dtype: float64)
ms = pd.Series()
Series([], dtype: float64)
ps.dtypes == ms.dtypes
True

Can you elaborate?

Related to #3141 .

[YarShev]

@Rubtsowa , what pandas version do you have installed?

[Rubtsowa]

@YarShev 1.2.4

[Rubtsowa]

Having discussed offline it was found out the issue is related to BaseOnPython tests only. To get dtype of the underlying object to_pandas method is called underneath that creates an empty pandas DataFrame. That empty DataFrame has object as dtype that is retured to user side.

[YarShev]

42078

[Garra1980]

so what is the plan here then?

[Garra1980]

We need to wait Pandas 2.0 for test unskipping

[RehanSD]

Hi @Rubtsowa @Garra1980 @dchigarev @YarShev has this issue been resolved?

[anmyachev]

Fixed in #5995.