intersphinx link to pandas autodoc API

Question

I'm attempting to link to the apply() autodoc documentation at: http://pandas.pydata.org/pandas-docs/dev/generated/pandas.DataFrame.apply.html.

I can link to the release page at: http://pandas.pydata.org/pandas-docs/dev/release.html by using...

:ref:`release <pandas:release>`

... but I can't seem to get the proper link to the autodoc pages. My intersphinx mapping is configured as...

{'python': ('http://docs.python.org/', None),
 'pandas': ('http://pandas.pydata.org/pandas-docs/dev', None)}`

... and I've tried the following variations of links to the apply() method:

:ref:`apply <pandas:pandas.dataframe.apply>`
:ref:`apply <pandas:pandas-dataframe-apply>`
:ref:`apply <pandas:dataframe.apply>`
:ref:`apply <pandas:DataFrame.apply>`
:ref:`apply <pandas.DataFrame.apply>`
:ref:`apply <pandas.dataframe.apply>`
:meth:`apply <pandas:pandas.dataframe.apply>`
:meth:`pandas:pandas.dataframe.apply`
:meth:`pandas.dataframe.apply`

Answer

As mzjn answered below, the link is case sensitive so any of the following work in my situation:

:meth:`apply <pandas:pandas.DataFrame.apply>`
:meth:`pandas:pandas.DataFrame.apply`
:meth:`pandas.DataFrame.apply`

Answer 1

Be careful with the spelling. All the cross-references in the question that use the :meth: role will work if dataframe is changed to DataFrame.