[GRASS-dev] [GRASS-SVN] r66995 - grass-addons/grass7/vector/v.in.natura2000

[Markus Neteler]

On Tue, Dec 1, 2015 at 7:24 PM, Vaclav Petras <wenzeslaus at gmail.com> wrote:
> Hi Helmut,
>
> On Tue, Dec 1, 2015 at 5:11 AM, <svn_grass at osgeo.org> wrote:
>>
>> +try:
>> +    import pyspatialite.dbapi2 as db
>> +except ImportError:
>> +    grass.warning( "pyspatialite has to be installed." )
>
>
> better than this is the approach taken in v.flexture where you let parser
> run and then you import the special dependencies. v.class.mlpy and
> especially v.class.ml are more complicated cases where the dependencies are
> spread more through the code but similar approach is still applicable.
>
> As you can see from v.flexture, there was an idea to provide a way how to
> install the dependencies but this might be too difficult and suggestions in
> the error message or manual might be just the right thing to do.
>
> Vaclav
>
> https://trac.osgeo.org/grass/browser/grass-addons/grass7/vector/v.flexure/v.flexure.py
> https://trac.osgeo.org/grass/browser/grass-addons/grass7/vector/v.class.mlpy/v.class.mlpy.py
> https://trac.osgeo.org/grass/browser/grass-addons/grass7/vector/v.class.ml/v.class.ml.py

FWIW, today I have added a termcolor check to g.search.modules, just
within the code.

https://trac.osgeo.org/grass/changeset/67001

Only if the user requested -c (colorize) the check is executed (hence,
after the parser was called).

Hope this makes sense,
Markus