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  • fujiisoup · 6 ✖

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  • IPython auto-completion triggers data loading · 6 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
345423843 https://github.com/pydata/xarray/issues/1727#issuecomment-345423843 https://api.github.com/repos/pydata/xarray/issues/1727 MDEyOklzc3VlQ29tbWVudDM0NTQyMzg0Mw== fujiisoup 6815844 2017-11-18T07:09:40Z 2017-11-18T07:09:40Z MEMBER

@shoyer Thanks. Confirmed. Closing.

 
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   IPython auto-completion triggers data loading 275033174
345423506 https://github.com/pydata/xarray/issues/1727#issuecomment-345423506 https://api.github.com/repos/pydata/xarray/issues/1727 MDEyOklzc3VlQ29tbWVudDM0NTQyMzUwNg== fujiisoup 6815844 2017-11-18T07:01:51Z 2017-11-18T07:01:51Z MEMBER

Thanks @shoyer . I think I should close the issue in jedi.

 
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   IPython auto-completion triggers data loading 275033174
345422593 https://github.com/pydata/xarray/issues/1727#issuecomment-345422593 https://api.github.com/repos/pydata/xarray/issues/1727 MDEyOklzc3VlQ29tbWVudDM0NTQyMjU5Mw== fujiisoup 6815844 2017-11-18T06:39:07Z 2017-11-18T06:39:07Z MEMBER

It seems jedi's bug.

A minimal working example is 1. Save following as example.py ```python import traceback

class ExampleClass(object): def init(self): pass

@property
def value(self):
    print('value called')
    print(traceback.print_exc())

2. In IPython, dopython In [1]: import example

In [2]: ex = example.ExampleClass()

In [3]: ex.val -> press [Tab] value called Traceback (most recent call last): None KeyError: (('value',), frozenset()) File "/home/keisukefujii/anaconda3/envs/tensorflow/lib/python3.5/site-packages/jedi/cache.py", line 119, in wrapper return dct[key] File "/home/keisukefujii/anaconda3/envs/tensorflow/lib/python3.5/site-packages/jedi/cache.py", line 46, in wrapper return getattr(self, name) value called None AttributeError: 'CompiledName' object has no attribute '_infer' Traceback (most recent call last): ```

 
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   IPython auto-completion triggers data loading 275033174
345411599 https://github.com/pydata/xarray/issues/1727#issuecomment-345411599 https://api.github.com/repos/pydata/xarray/issues/1727 MDEyOklzc3VlQ29tbWVudDM0NTQxMTU5OQ== fujiisoup 6815844 2017-11-18T02:22:35Z 2017-11-18T02:22:57Z MEMBER

I found this happens with IPython=6.1.0, but does not with IPython=5.1.0. Maybe it is the upstream issue.

But if we can avoid this within xarray, it would be great,

 
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   IPython auto-completion triggers data loading 275033174
345408881 https://github.com/pydata/xarray/issues/1727#issuecomment-345408881 https://api.github.com/repos/pydata/xarray/issues/1727 MDEyOklzc3VlQ29tbWVudDM0NTQwODg4MQ== fujiisoup 6815844 2017-11-18T01:45:30Z 2017-11-18T01:45:30Z MEMBER

Thanks. This is reproduced also in my environment. It's strange ... Tagged as a bug.

 
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   IPython auto-completion triggers data loading 275033174
345406561 https://github.com/pydata/xarray/issues/1727#issuecomment-345406561 https://api.github.com/repos/pydata/xarray/issues/1727 MDEyOklzc3VlQ29tbWVudDM0NTQwNjU2MQ== fujiisoup 6815844 2017-11-18T01:17:44Z 2017-11-18T01:17:44Z MEMBER

Your xr.Dataset consists only from a single coordinate variable python <xarray.Dataset> Dimensions: (myvar: 100000000) Coordinates: * myvar (myvar) float64 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 ... Data variables: *empty* (This behavior is somehow confusing...)

In xarray, coordinate variables are always loaded into memory.

The following example works well

```python In [1]: import xarray as xr ...: import numpy as np ...: ds = xr.Dataset({'myvar': (('x', 'y'), np.arange(100000000).reshape(1000 ...: , 100000))}, ...: coords={'x': np.arange(1000)}) ...: ds.to_netcdf('test.nc') ...:

In [2]: ds_on_disk = xr.open_dataset('test.nc') ...: ds_on_disk['myvar'].variable._in_memory ...: Out[2]: False

In [3]: ds_on_disk.my # -> [Tab] In [3]: ds_on_disk.myvar.variable._in_memory ...: Out[3]: False

In [4]: ds_on_disk['x'].variable._in_memory Out[4]: True ```

 
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   IPython auto-completion triggers data loading 275033174

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