BUG: inspect.getmembers(Series) by topper-123 · Pull Request #38782 · pandas-dev/pandas (original) (raw)

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topper-123

Make inspect.getmembers(Series) work, previously raised an AbstractMethodError.

xref: #38740

@topper-123 topper-123 changed the titleTST: test inspect.getmembers(Series) BUG: inspect.getmembers(Series)

Dec 29, 2020

jreback

@@ -302,7 +302,7 @@ ExtensionArray
Other
^^^^^
-
- ``inspect.getmembers(Series)`` no longer raises an ``AbstractMethodError`` (:issue:`38782`).

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note we backported the other issue. ok for this too.

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remove from here

@jreback jreback added Bug Compat

pandas objects compatability with Numpy or Python functions

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Dec 29, 2020

topper-123

original, such as DataFrame single columns slicing.
"""
raise AbstractMethodError(self)

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This isn't used on Series. Calling it on a Series should just result in an AttributeError.

jreback

@@ -302,7 +302,7 @@ ExtensionArray
Other
^^^^^
-
- ``inspect.getmembers(Series)`` no longer raises an ``AbstractMethodError`` (:issue:`38782`).

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remove from here

@jorisvandenbossche

Note there was quite some discussion about this on #31549 (it is also reported as a bug in python itself), and in the and this was fixed for _constructor_expanddim differently in #33628

I don't care much about how it is folved, but probably good to be consistent for _constructor_expanddim and _constructor_sliced ?

note we backported the other issue. ok for this too.

I would just leave it for 1.3 (it's not a regression like the other issue). You never know how some subclass might be using this method (or relying on the exact error class)

@jreback

I would just leave it for 1.3 (it's not a regression like the other issue). You never know how some subclass might be using this method (or relying on the exact error class)

makes sense.

@topper-123

I don't care much about how it is folved, but probably good to be consistent for _constructor_expanddim and _constructor_sliced ?

I've made a new version, where they're the same: _constructor_sliced is only for DataFrame (it doesn't make sense for Series) and _constructor_expanddim is only available on Series (doesn't make sense for DataFrame, now that NDFrame higher than 2 is gone).

jorisvandenbossche

``_constructor_sliced`` ``NotImplementedError`` ``Series``
``_constructor_expanddim`` ``DataFrame`` ``NotImplementedError``
=========================== ======================= =============
* ``DataFrame/Series._constructor``: Used when a manipulation result has the same (sub-)class as the original.

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I would keep the "same dimension as the original", because it doesn't necessarily need to return the same class (eg a subclass' _constructor can return a non-subclassed DataFrame in certain cases)

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I didn't like "same dimension as the original" because it could be understood like e.g. an array could be used, which would be wrong. By using "(sub-)class" is is implied that for e.g. for Series you have to supply a Series or a subclass of a Series (but not a DataFrame or a 1-dim array).

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Is this ok? My opinion is that it’s better to emphazise the type Here, rather than the dimensionality.

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I’ve changed this to say dimension rather than subclass. IDT the next gwo lines shares this issue, but let me know.

@topper-123

jreback

@jreback

CyberQin pushed a commit to CyberQin/pandas that referenced this pull request

Feb 8, 2021

@topper-123 @CyberQin

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Bug Compat

pandas objects compatability with Numpy or Python functions