Hi Daniel: I've always thought it normal to need to 'use PDL' and then
'use PDL::NetCDF' in any script that needs PDL::NetCDF support.
PDL group: Is it normal to do all required 'uses' in the module, or
should the script calling the module be expected to do it?
I don't see that it would hurt to 'use PDL' in PDL/NetCDF.pm.
--Doug
[email protected]
Software Engineer
UCAR - COSMIC, Tel. (303) 497-2611
On Fri, 20 Apr 2012, Daniel B?hmer wrote:
Hello,
I am working in a team of two developing a web platform [1] for exchange of
scientific data files. One format we are going to support is NetCDF and we use
your CPAN module PDL::NetCDF for accessing the data in incoming files.
When writing our code around your module we had some problems with calls to
undefined subs. After some debugging we found out that it's strictly necessary
to include "use PDL" additionally to "use PDL::NetCDF".
In our understanding of Perl's module system your package could be including
"PDL" at its own because we're not really depending on PDL itself (but
PDL::NetCDF does), just using an arbitrary package which happens to have the
beginning of the module path in common with "PDL".
We solved our problem by just including "use PDL". But to save other people
from being trapped by the same issue we kindly ask you to add a simple "use
PDL" to your module as it actually depends on PDL.
After all we want to thank you for your efforts in developing PDL::NetCDF (and
other code) and providing them to the public. That saved us a lot of work.
With kind regards
Daniel B?hmer
[1] http://halo-db.tropos.de/
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Dipl.-Inf. (BA) Daniel B?hmer Leibniz Institute for
Mail: [email protected] Tropospheric Research
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Web: http://www.tropos.de/ GERMANY
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