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[netCDF #NPB-553460]: Python netCDF4


That is just a warning letting you know that the library, while it tries to 
automatically mask bad values using metadata like the "valid_range" attribute, 
is ignoring the "valid_range" attribute for your variable because the attribute 
has a different type than that of the original data values. It's only a 
warning, so your data should be fine, it's just that bad/missing values may not 
be properly masked.

For more information, see this GitHub issue: 


> I have worked with netCDF files in python before but only extracting single 
> values based on specific lat and lon combinations. This time I am having to 
> slice a variable to get all values that fall within a specific grid. My 
> script is working with no errors. However, on the first extraction in a loop 
> I am getting the following warning:
> UserWarning: WARNING: valid_range not used since it
> cannot be safely cast to variable data type.
> I am using Anaconda as my development environment and using files from the 
> following link:
> https://ecocast.arc.nasa.gov/data/pub/gimms/3g.v1/
> I just want to make sure that I am not doing anything wrong regarding 
> incorrect libraries, etc.
> Any advice would be appreciated. Thank you very much.

Ticket Details
Ticket ID: NPB-553460
Department: Support Python
Priority: Normal
Status: Closed
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