spyder-ide
Anaconda's Spyder gives DLL load failure when connected to Msys2 Python interpreter
Motivation: The package of interest only works with GCC compiled Python, and I would like to use an IDE (Spyder) to interpret the GCC compiled Python which is not the default MSC version of Python included with Anaconda 3 on windows.
Issue: DLL load failed while importing [package name]: The specified procedure could not be found.
System information: Windows 10 Home Build 19043.1526 with WSL Enabled. Bash: MSYS2 MinGW x64 Spyder 5.1.5 gcc version 11.2.0 targeting x86_64-w64-ming32 Python 3.9.10 (main, Jan 25 2022, 17:58:23) [GCC 11.2.0 64 bit (AMD64)]
Reproducible Example:
-Download Anaconda 3 which includes Spyder and default MSC compiled Python
-Use Msys2 64 bit with Mingw64 to obtain GCC compiled python. To do so, you would need to use pacman to obtain mingw-w64-x86_64-toolchain and python for mingw64.
-Install common python packages such as numpy, scipy, and matplotlib using pacman. You will also need spyder dependencies such as spyder-kernels and IPython -If the dependencies are not satisfied, spyder will fail to start the kernel.
-At this stage, running python in mingw64 (by typing “python” in bash) should have no problems. -Importing packages should also have no problems. e.g, import matplotlib.pyplot
-Try using Anaconda 3 Spyder to interpret the GCC python by going to: Tool > Preferences > Python interpreter > Select Use the following python interpreter > Set the location to “path to msys2\mingw64\bin\python.exe
-Depending on the matplotlib graphical settings, you may or may not already receive an error in the console regarding a DLL load failure. -If not, then importing matplotlib.pyplot or importing scipy.optimize, should give you the error. -However, starting GCC python in mingw64 will have no problem importing these packages.
Errors upon starting console:
Python 3.9.10 (main, Jan 25 2022, 17:58:23) [GCC 11.2.0 64 bit (AMD64)]
Type "copyright", "credits" or "license" for more information.
IPython -- An enhanced Interactive Python.
Output from spyder call 'show_mpl_backend_errors':
=========================================================================
NOTE: The following error appeared when setting your Matplotlib backend!!
=========================================================================
Traceback (most recent call last):
File "C:\msys64\mingw64\lib\python3.9\site-packages\spyder_kernels\console\kernel.py", line 739, in _set_mpl_backend
get_ipython().run_line_magic(magic, backend)
File "C:\msys64\mingw64\lib\python3.9\site-packages\IPython\core\interactiveshell.py", line 2364, in run_line_magic
result = fn(*args, **kwargs)
File "C:\msys64\mingw64\lib\python3.9\site-packages\decorator.py", line 232, in fun
return caller(func, *(extras + args), **kw)
File "C:\msys64\mingw64\lib\python3.9\site-packages\IPython\core\magic.py", line 187, in <lambda>
call = lambda f, *a, **k: f(*a, **k)
File "C:\msys64\mingw64\lib\python3.9\site-packages\IPython\core\magics\pylab.py", line 99, in matplotlib
gui, backend = self.shell.enable_matplotlib(args.gui.lower() if isinstance(args.gui, str) else args.gui)
File "C:\msys64\mingw64\lib\python3.9\site-packages\ipykernel\zmqshell.py", line 601, in enable_matplotlib
gui, backend = super(ZMQInteractiveShell, self).enable_matplotlib(gui)
File "C:\msys64\mingw64\lib\python3.9\site-packages\IPython\core\interactiveshell.py", line 3533, in enable_matplotlib
from matplotlib_inline.backend_inline import configure_inline_support
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib_inline\backend_inline.py", line 7, in <module>
from matplotlib.backends.backend_agg import ( # noqa
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\backends\backend_agg.py", line 35, in <module>
from PIL import Image
File "C:\msys64\mingw64\lib\python3.9\site-packages\PIL\Image.py", line 89, in <module>
from . import _imaging as core
ImportError: DLL load failed while importing _imaging: The specified procedure could not be found.
Importing matplotlib
In [1]: import matplotlib.pyplot
Traceback (most recent call last):
File "<ipython-input-1-864e826dab68>", line 1, in <module>
import matplotlib.pyplot
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\pyplot.py", line 36, in <module>
import matplotlib.colorbar
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\colorbar.py", line 44, in <module>
import matplotlib.contour as contour
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\contour.py", line 17, in <module>
import matplotlib.text as text
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\text.py", line 16, in <module>
from .textpath import TextPath # Unused, but imported by others.
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\textpath.py", line 11, in <module>
from matplotlib.mathtext import MathTextParser
File "C:\msys64\mingw64\lib\python3.9\site-packages\matplotlib\mathtext.py", line 27, in <module>
from PIL import Image
File "C:\msys64\mingw64\lib\python3.9\site-packages\PIL\Image.py", line 89, in <module>
from . import _imaging as core
ImportError: DLL load failed while importing _imaging: The specified procedure could not be found.
Importing Scipy.optimize
In [2]: import scipy.optimize
Traceback (most recent call last):
File "<ipython-input-2-77fb0d19797b>", line 1, in <module>
import scipy.optimize
File "C:\msys64\mingw64\lib\python3.9\site-packages\scipy\optimize\__init__.py", line 413, in <module>
from ._linprog import linprog, linprog_verbose_callback
File "C:\msys64\mingw64\lib\python3.9\site-packages\scipy\optimize\_linprog.py", line 22, in <module>
from ._linprog_highs import _linprog_highs
File "C:\msys64\mingw64\lib\python3.9\site-packages\scipy\optimize\_linprog_highs.py", line 20, in <module>
from ._highs._highs_wrapper import _highs_wrapper
ImportError: DLL load failed while importing _highs_wrapper: The specified procedure could not be found.
Hey @MustyHickory106, thanks for reporting. This could be happening because Msys2 requires some environment variables set to work and we're not doing that when we start an IPython console with the Msys2 Python interpreter.
This seems a legitimate bug to me, but (unfortunately) it's very fringe (you are the only who have noticed it, as far as I can recall). Since we're busy with other things at the moment and terribly understaffed, we're not going to address it for now, sorry.
Does it work when you import the package name from the console after activating your environment? I ran into this issue myself: https://github.com/spyder-ide/spyder/issues/19220 Edit: it was solved by removing Anaconda paths from the Path environment variable. Maybe this also works for you?
removing the anaconda environment Path variables has removed the problem for me (for now at least), thank you for the recommendation @veenstrajelmer
I also had the same problem and removing conda-specific paths from Path environment variable helped.
