Explicitly import "numpy" for "ArrayImage" import #1004
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This commit explicitly adds a numpy import before the ArrayImage import to ensure that an ImportError is raised instead of a TraitError, which will get caught and handled correctly by the _optional_import utility
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This PR explicitly adds a
numpyimport before theArrayImageimport to ensure that anImportErroris raised instead of aTraitError, which will get caught and handled correctly by the_optional_importutility.This was first observed thanks to the cron job - https://github.com/enthought/envisage/runs/3139307870