Hi All,
Hope this is the right forum.
I am working on using Numpy from the programming language Racket.
My plan of attack is to use Python via `libpython`.
That is, from Racket I use `ffilib` to load `libpython` and from there I use
the C API
to control Python.
Here is what works at the moment:
1. From Racket I can load `libpython` via `ffilib`.
2. It is possible to initialize a Python process and run Python programs in it.
3. It is possible to import modules written in Python.
What doesn't work is importing `numpy`.
The error I get when I run `import numpy` is:
ImportError:
dlopen(/usr/local/lib/python3.10/site-packages/numpy/core/_multiarray_umath.cpython-310-darwin.so,
0x0002):
symbol not found in flat namespace
'_PyBaseObject_Type'
Right now, I am trying to figure out where things went wrong.
First I checked that Numpy works in the terminal (it did):
soegaard@mbp2 ~ %
/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10/bin/python3.10
Python 3.10.4 (main, Apr 26 2022, 19:42:59) [Clang 13.1.6
(clang-1316.0.21.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> numpy.array([[1, 2, 3], [4, 5, 6]], numpy.int32)
array([[1, 2, 3],
[4, 5, 6]], dtype=int32)
I notice that Python is built with `clang`.
Is this okay?
I ask, partly because there is a cryptic note on GCC in the Numpy installation
guide
and partly because I have seen posts where static link problems where due to
mixing
gcc and clang binaries.
I installed `python3.10` on my Intel mac using HomeBrew.
Then I installed `numpy` using `pip`.
Since XCode terminal commands are installed the system `gcc` actually invokes
`clang`.
In order to check that the paths are as expected, I made the embedded Python
instance
print out the paths before issuing the command `import numpy`:
(ProgramName
/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10/bin/python3.10)
(Prefix
/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10)
(ExecPrefix
/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10)
(ProgramFullPath
/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10/bin/python3.10)
(Path
/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10/lib/python310.zip:/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10/lib/python3.10:/usr/local/Cellar/python@3.10/3.10.4/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload)
(PythonHome #f)
The full error message was:
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/numpy/core/__init__.py", line
23, in <module>
from . import multiarray
File "/usr/local/lib/python3.10/site-packages/numpy/core/multiarray.py", line
10, in <module>
from . import overrides
File "/usr/local/lib/python3.10/site-packages/numpy/core/overrides.py", line
6, in <module>
from numpy.core._multiarray_umath import (
ImportError:
dlopen(/usr/local/lib/python3.10/site-packages/numpy/core/_multiarray_umath.cpython-310-darwin.so,
0x0002): symbol not found in flat namespace '_PyBaseObject_Type'
Any help is appreciated.
--
Jens Axel Søgaard
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