ImportError: Couldn't locate OpenSlide dylib. Is OpenSlide installed?

[Epstein, David]

I get the error message in the Subject Line. So I looked at the discussion at
https://github.com/openslide/openslide-python/issues/27
and carefully followed all the advice given there, but the error persists.

bgilbert locked the topic on github in December 2019, saying that the problem was resolved. He also said:
"This is likely to be a problem with your installation, so I'll close. If you're still seeing this with OpenSlide installed in your library search path, please reopen.” I don’t know how one can reopen a locked topic on Github. Perhaps this will do the trick.

I thought the problem was that I installed openslide-python first, and openslide later, but I tried
sudo port install openslide
first, and that didn’t work.

Here is the command I gave to macports, and the response from macports.This seems to mean that openslide file(s) are installed, but is there a way of checking further, in particular checking that there is nothing wrong with the files?

From the discussion on Github, it seems that the problem may be with Macports. I could (very reluctantly) delete my Macports installation and reinstate it. Does anyone have some wise advice?

$ port search openslide
openslide @3.4.1_1 (graphics)
    A C library for reading virtual slides.

py-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py27-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py34-openslide @1.1.2_1 (python, graphics)
    Obsolete port, replaced by py35-openslide

py35-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py36-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py37-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py38-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py39-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

Found 9 ports.



openslide @3.4.1_1 (graphics)
    A C library for reading virtual slides.

py-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py27-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py34-openslide @1.1.2_1 (python, graphics)
    Obsolete port, replaced by py35-openslide

py35-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py36-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py37-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py38-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

py39-openslide @1.1.2_1 (python, graphics)
    Python binding for the OpenSlide library.

Found 9 ports.







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