issue_comments: 143382040

OK, I think you could also just add an ensured_open() to the repr() method. Right now that class is inheriting it from NDArrayMixin.

On Fri, Sep 25, 2015 at 5:11 PM, Christoph Paulik notifications@github.com wrote:

OK, I'll try. Thanks. But I originally tested if netCDF4 can work with a closed/reopened variable like this:

``` python In [1]: import netCDF4 In [2]: a = netCDF4.Dataset("temp.nc", mode="w") In [3]: a.createDimension("lon") Out[3]: <class 'netCDF4._netCDF4.Dimension'> (unlimited): name = 'lon', size = 0 In [4]: a.createVariable("lon", "f8", dimensions=("lon")) Out[4]: <class 'netCDF4._netCDF4.Variable'> float64 lon(lon) unlimited dimensions: lon current shape = (0,) filling on, default FillValue of 9.969209968386869e+36 used In [5]: v = a.variables['lon'] In [6]: v Out[6]: <class 'netCDF4._netCDF4.Variable'> float64 lon(lon) unlimited dimensions: lon current shape = (0,) filling on, default _FillValue of 9.969209968386869e+36 used In [7]: a.close() In [8]: v Out[8]: --------------------------------------------------------------------------- RuntimeError Traceback (most recent call last) /home/cp/.pyenv/versions/miniconda3-3.16.0/envs/xray-3.5.0/lib/python3.5/site-packages/IPython/core/formatters.py in __call__(self, obj) 695 type_pprinters=self.type_printers, 696 deferred_pprinters=self.deferred_printers) --> 697 printer.pretty(obj) 698 printer.flush() 699 return stream.getvalue() /home/cp/.pyenv/versions/miniconda3-3.16.0/envs/xray-3.5.0/lib/python3.5/site-packages/IPython/lib/pretty.py in pretty(self, obj) 381 if callable(meth): 382 return meth(obj, self, cycle) --> 383 return _default_pprint(obj, self, cycle) 384 finally: 385 self.end_group() /home/cp/.pyenv/versions/miniconda3-3.16.0/envs/xray-3.5.0/lib/python3.5/site-packages/IPython/lib/pretty.py in _default_pprint(obj, p, cycle) 501 if _safe_getattr(klass, '__repr__', None) not in _baseclass_reprs: 502 # A user-provided repr. Find newlines and replace them with p.break() --> 503 repr_pprint(obj, p, cycle) 504 return 505 p.begin_group(1, '<') /home/cp/.pyenv/versions/miniconda3-3.16.0/envs/xray-3.5.0/lib/python3.5/site-packages/IPython/lib/pretty.py in _repr_pprint(obj, p, cycle) 683 """A pprint that just redirects to the normal repr function.""" 684 # Find newlines and replace them with p.break() --> 685 output = repr(obj) 686 for idx,output_line in enumerate(output.splitlines()): 687 if idx: netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Variable.repr (netCDF4/_netCDF4.c:25045)() netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Variable.unicode (netCDF4/_netCDF4.c:25243)() netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Variable.dimensions.get (netCDF4/_netCDF4.c:27486)() netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Variable._getdims (netCDF4/_netCDF4.c:26297)() RuntimeError: NetCDF: Not a valid ID In [9]: a = netCDF4.Dataset("temp.nc") In [10]: v Out[10]: class 'netCDF4._netCDF4.Variable'> lon(lon) dimensions: lon shape = (0,) on, default _FillValue of 9.969209968386869e+36 used

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