issues: 536900797

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
536900797 MDU6SXNzdWU1MzY5MDA3OTc= 3614 Autocomplete in registered accessors 48983334 closed 0     6 2019-12-12T10:49:53Z 2019-12-16T14:53:08Z 2019-12-16T14:40:25Z CONTRIBUTOR      

At present if you use register_dataset_accessor() or register_dataarray_accessor(), ipython can not autocomplete to function within that accessor. For example:

MCVE Code Sample

```python import xarray as xr

@xr.register_dataset_accessor('geo') class GeoAccessor: def init(self, xarray_obj): self._obj = xarray_obj

@property
def center(self):
    # return the geographic center point of this dataset
    lon = self._obj.latitude
    lat = self._obj.longitude
    return (float(lon.mean()), float(lat.mean()))

def plot(self):
    # plot this array's data on a map, e.g., using Cartopy
    pass

```

Expected Output

It would be good if in ipython when pressing TAB data.geo.c would autocomplete to data.geo.center().

Output of xr.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 3.7.5 (default, Oct 17 2019, 12:16:48) [GCC 9.2.1 20190827 (Red Hat 9.2.1-1)] python-bits: 64 OS: Linux OS-release: 5.3.12-300.fc31.x86_64 machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_IE.UTF-8 LOCALE: en_IE.UTF-8 libhdf5: 1.10.4 libnetcdf: 4.6.3 xarray: 0.14.1 pandas: 0.25.3 numpy: 1.17.4 scipy: 1.2.1 netCDF4: 1.5.3 pydap: None h5netcdf: None h5py: 2.9.0 Nio: None zarr: None cftime: 1.0.4.2 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2.9.0 distributed: None matplotlib: 3.1.2 cartopy: None seaborn: None numbagg: None setuptools: 42.0.2 pip: 19.1.1 conda: None pytest: None IPython: 7.10.1 sphinx: None 
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   completed 13221727 issue

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