[gdal-dev] ModuleNotFoundError: No module named 'osgeo._gdal_array'

[Even Rouault]

Lorenzo,

you didn't mention which Linux distro you used and how you installed numpy

I'm aware at least that on Alpine Linux, you need to install an 
additional py3-numpy-dev package with the headers & lib needed to use 
the C API of numpy, which is needed by the GDAL Python bindings

Check that the following returns something sensible

python3 -c "import numpy; print(numpy.get_include())"

when you build the GDAL python bindings look for the following messages 
in the output that will indicate that the gdal_array module can't be built

"WARNING: numpy headers were not found!  Array support will not be enabled"

or

'WARNING: numpy not available!  Array support will not be enabled'

Even

Le 24/09/2021 à 14:53, Lorenzo Di Giacomo a écrit :
> Hi everyone, basically i build from source GDAL 3.2.2 and install the 
> python bindings via pip3 install gdal==3.2.2
>
> Later i install numpy, i have read online that the numpy must be 
> installed before GDAL python bindings.
> So i tried to uninstall python gdal and than reinstall it, but the 
> problem still persists.
>
> Do you have any suggestions about it?
>
> Python3 libraries:
> GDAL 3.2.2
> NUMPY 1.21.2
>
> SWIG 4.0.2
>
> LOG:
> ModuleNotFoundError: No module named 'osgeo._gdal_array'
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
>    File "temp-1544239507789228725main.py", line 98, in <module>
>      SSRD,gtSSRD = tiff2array(path_to_tiff, band_SSRD)
>    File "/hadoop/yarn/local/usercache/dispatcher/appcache/application_1628674283442_0030/container_e33_1628674283442_0030_01_000001/61a5101c-d78d-494d-b0d6-ef16719143719035222534140350861632485975806.zip/utility/rasterutils.py", line 58, in tiff2array
>    File "/usr/local/lib/python3.7/site-packages/osgeo/gdal.py", line 3832, in ReadAsArray
>      from osgeo import gdalnumeric
>    File "/usr/local/lib/python3.7/site-packages/osgeo/gdalnumeric.py", line 2, in <module>
>      from osgeo.gdal_array import *
>    File "/usr/local/lib/python3.7/site-packages/osgeo/gdal_array.py", line 17, in <module>
>      _gdal_array = swig_import_helper()
>    File "/usr/local/lib/python3.7/site-packages/osgeo/gdal_array.py", line 16, in swig_import_helper
>      return importlib.import_module('_gdal_array')
>    File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
>      return _bootstrap._gcd_import(name[level:], package, level)
> ModuleNotFoundError: No module named '_gdal_array'
>
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