Hello,
I have written a C-extension for python that uses arrays from python, does
calculations on them and returns a result on that.
I have now also added the possibility to provide numpy arrays. However this is
not a requirement. Python arrays (lists) are still allowed also. I check in the
C-code which kind of arrays are provided.
That all works ok, but I have one problem. In the initialisation function for
the extension I call import_array to initialise the numpy library.
The problem is if numpy is not installed on the system, that this call
generates a message and an error and the rest of the routine is aborted.
Via the source code of numpy I discovered that import_array is in fact a macro
that calls _import_array and checks its return value to give the message.
But even it I call _import_array myself and check for the return code, after
the initialisation routine has finished I still get the message 'No module
named numpy.core.multiarray'.
How can I test if numpy is installed on the system from the extension so that I
do not active the numpy functionality and that it is still able to use my
extension, but then without numpy support?
I have searched in the manual and documentation, searched in google, but I do
not find an answer on that question.
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