Cannot access member "contains" for type "ExtensionArray"

[davetapley]

Describe the bug

Cannot access member "contains" for type "ExtensionArray"
  Member "contains" is unknownPylance[reportGeneralTypeIssues](https://github.com/microsoft/pyright/blob/main/docs/configuration.md#reportGeneralTypeIssues)
(function) contains: Unknown

To Reproduce

from pandas-dev/pandas#52616 (comment):

df = pd.DataFrame({'A': range(1, 10)})
obj = pd.Interval(1,4)
ser = pd.Series(obj, index=df.index)
arr = ser.array
arr.contains(df["A"])

Please complete the following information:

• OS: Linux
• OS Version Ubuntu 20.04.4 LTS
• python version 3.10.9
• version of type checker Pylance v2023.4.40
• version of installed pandas-stubs 2.0.0.230412-py3-none-any

[twoertwein]

ExtensionArray does not have contains. arr is in your example of type IntervalArray which has contains (in pandas and pandas-stubs).

We might be able to have overloads for def array based on the generic type: return specific subclasses and fallback to ExtensionArray.

[Dr-Irv]

There are a couple of issues here:

1. We are not recognizing that pd.Series(pd.Interval(1,4)) produces pd.Series[Interval[int]]
2. If we have a Series[Interval[int]] or Series[Interval[float]], then Series.array should return IntervalArray rather than ExtensionArray

To solve the latter, need to create an overload for Series.array(), but I'm not sure that will work with mypy, so may need to have a type called IntervalSeries that takes care of that.