issues: 171956399
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| 171956399 | MDU6SXNzdWUxNzE5NTYzOTk= | 975 | invalid timestamps in the future | 10194086 | closed | 0 | 6 | 2016-08-18T17:29:02Z | 2016-08-25T22:39:26Z | 2016-08-25T22:39:26Z | MEMBER | If I have a netCDF file that has invalid timesteps from the 'future', it is wrongly converted to datetime64[ns]. ``` import netCDF4 as nc import numpy as np import xarray as xr create netCDF filencf = nc.Dataset('test_future.nc', 'w') ncf.createDimension('time') ncf.createVariable('time', np.int, dimensions=('time')) ncf.variables['time'].units = 'days since 1850-01-01 00:00:00' ncf.variables['time'].calendar = 'standard' ncf.variables['time'][:] = np.arange(850) * 365 ncf.close() open with xrds = xr.open_dataset('test_future.nc') this worksds ds.time is a datetime64[ns] objectthis failsds.time ``` If I choose chalendar='noleap' the dates wrap around! ``` ncf = nc.Dataset('test_future_noleap.nc', 'w') ncf.createDimension('time') ncf.createVariable('time', np.int, dimensions=('time')) ncf.variables['time'].units = 'days since 1850-01-01 00:00:00' ncf.variables['time'].calendar = 'noleap' ncf.variables['time'][:] = np.arange(850) * 365 ncf.close() open with xrds = xr.open_dataset('test_future_noleap.nc') after 2262 they go back to 1678!ds.time ``` If my 'invalid' time is from the 'past' it works as expected: ``` ncf = nc.Dataset('test_past.nc', 'w') ncf.createDimension('time') ncf.createVariable('time', np.int, dimensions=('time')) ncf.variables['time'].units = 'days since 1000-01-01 00:00:00' ncf.variables['time'].calendar = 'standard' ncf.variables['time'][:] = np.arange(850) * 365 ncf.close() open with xrds = xr.open_dataset('test_past.nc') this worksds ds.time is a objectds.time ``` |
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completed | 13221727 | issue |