Hi,
I have the following problem -- I have a package hermes2d, with the structure:
hermes2d/__init__.py
hermes2d/_hermes2d.pyx + .pxd
hermes2d/_forms.pyx
and sometimes (depending on what the users tells cmake) I want to
build the .so libraries out of the tree and put their paths to
PYTHONPATH. Things just work as long as remove the file
hermes2d/__init__.py during the cython compilation. The reason is that
if I do:
cd hermes2d
cython _forms.pyx
it produces _forms.c with lines like:
__pyx_ptype_8hermes2d_9_hermes2d_LinSystem =
__Pyx_ImportType("hermes2d._hermes2d", "LinSystem", sizeof(struct
__pyx_obj_8hermes2d_9_hermes2d_LinSystem)); if
(unlikely(!__pyx_ptype_8hermes2d_9_hermes2d_LinSystem))
{__pyx_filename = __pyx_f[1]; __pyx_lineno = 292; __pyx_clineno =
__LINE__; goto __pyx_L1_error;}
Notice the import "hermes2d._hermes2d", which fails if _hermes2d.so is
out of the tree (e..g somewhere else on the filesystem, even if it's
in the search path!). If, however I remove the __init__.py, then
cython generates:
__pyx_ptype_9_hermes2d_LinSystem = __Pyx_ImportType("_hermes2d",
"LinSystem", sizeof(struct __pyx_obj_9_hermes2d_LinSystem)); if
(unlikely(!__pyx_ptype_9_hermes2d_LinSystem)) {__pyx_filename =
__pyx_f[1]; __pyx_lineno = 292; __pyx_clineno = __LINE__; goto
__pyx_L1_error;}
and everything just works, no matter where the file _hermes2d.so actually is.
Now my question is -- if I want those .so libraries not to be in the
tree, am I doing things the right way? E.g. I just have a line:
from _forms import *
in the hermes2d/forms.py
and then people just do "from hermes2d import forms" and things work,
no matter where the .so files are. But I need some way to force cython
to just pretend there is no __init__.py in there. Why is cython doing
this check at all? Does it have any advantages?
Thanks,
Ondrej
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