issue_comments: 449167848

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https://github.com/pydata/xarray/issues/2623#issuecomment-449167848 https://api.github.com/repos/pydata/xarray/issues/2623 449167848 MDEyOklzc3VlQ29tbWVudDQ0OTE2Nzg0OA== 2014301 2018-12-20T23:13:43Z 2018-12-20T23:13:43Z NONE

@shoyer Thank you! Here it is:

Traceback (most recent call last): File "./concat.py", line 38, in <module> ncconcat.to_netcdf(os.path.join(ncdir, finalfile), 'w') File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/core/dataset.py", line 1222, in to_netcdf compute=compute) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/backends/api.py", line 718, in to_netcdf unlimited_dims=unlimited_dims) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/backends/api.py", line 761, in dump_to_store unlimited_dims=unlimited_dims) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/backends/common.py", line 261, in store variables, attributes = self.encode(variables, attributes) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/backends/common.py", line 347, in encode variables, attributes = cf_encoder(variables, attributes) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/conventions.py", line 573, in cf_encoder for k, v in iteritems(variables)) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/conventions.py", line 573, in <genexpr> for k, v in iteritems(variables)) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/conventions.py", line 235, in encode_cf_variable var = coder.encode(var, name=name) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/coding/times.py", line 395, in encode encoding.pop('calendar', None)) File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/xarray/coding/times.py", line 365, in encode_cf_datetime num = (pd.DatetimeIndex(dates.ravel()) - ref_date) / time_delta File "/glade/u/home/manab/anaconda3/lib/python3.6/site-packages/pandas/core/indexes/base.py", line 3885, in invalid_op "{typ}".format(name=name, typ=type(self))) TypeError: cannot perform __truediv__ with this index type: <class 'pandas.core.indexes.datetimes.DatetimeIndex'>

 
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