DOC: add axes attributes to API docs

[jreback]

from SO

People just jump to the API w/o actually reading ANY Introduction where this is convered in the first sentence

so API docs should be more complete

[jorisvandenbossche]

Do you know why index and columns are not listed there and other attributes such as values is? As these are generated automatically based on the sphinx/numpydoc inspection of the DataFrame class

[jorisvandenbossche]

inspect.getmembers(pd.DataFrame) does not include it (it includes it in the __dict__ item, but not top-level). So the problem with how the index and columns attributes are defined in the DataFrame/NDFrame class

[kawochen]

@jorisvandenbossche https://github.com/pydata/pandas/blob/master/pandas/src/properties.pyx#L53

[kawochen]

In [1]: import pandas

In [2]: import inspect

In [3]: 'index' in [x[0] for x in inspect.getmembers(pandas.DataFrame)]
Out[3]: True

In [4]: 'columns' in [x[0] for x in inspect.getmembers(pandas.DataFrame)]
Out[4]: True

PY3 though.

[pdpark]

Looking for an easy documentation fix for my first contribution to an open source project and I came across this open Issue. However, after forking the repo and compiling the docs locally, this seems to be fixed - I see "columns" and "index" in the Attributes section now - albeit w/o any description.

It looks like it's fixed in the latest build: https://pandas-docs.github.io/pandas-docs-travis/generated/pandas.DataFrame.html#pandas.DataFrame

[TomAugspurger]

Ah, #18196 fixed the error but didn’t add a docstring.