Re: [Ifeffit] Larch Mac OS X 10.15 Catalina

9 Jan 2020

      Hi Jeff,

Sorry for the trouble, and yes I can confirm this trouble.  It's actually
not specific to MacOS version.  It appears to be related to Python 3.7.6
(yes, 3.7.5 and 3.8.0 were OK) breaking pyepics on all systems.
Unfortunately, a "conda update" will now install Python 3.7.6.

For now, I would suggest just removing pyepics from the installation (it's
not really necessary for Larch functionality) with

   rm -rf /Users/jterry/anaconda3/lib/python3.7/site-packages/epics/

I think that should work, at least until pyepics gets fixed.

On Thu, Jan 9, 2020 at 2:37 AM Jeff Terry  wrote:
...
Hi Matt,
I had to upgrade my Mac to OS X 10.15 and it blew up my Anaconda
distribution which has forced me to reinstall everything from scratch.
Now whether I install larch from source or by using conda, I get the
following error:
Traceback (most recent call last):
  File "/Users/jterry/anaconda3/lib/python3.7/ctypes/__init__.py", line
97, in CFUNCTYPE
    return _c_functype_cache[(restype, argtypes, flags)]
KeyError: (None, (,), 1)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/Users/jterry/anaconda3/bin/larch", line 11, in <module>
    load_entry_point('xraylarch==0.9.46', 'console_scripts', 'larch')()
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py",
line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py",
line 2852, in load_entry_point
    return ep.load()
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py",
line 2443, in load
    return self.resolve()
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/pkg_resources/__init__.py",
line 2449, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/larch/__init__.py",
line 50, in <module>
    from . import builtins
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/larch/builtins.py",
line 33, in <module>
    from . import epics
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/larch/epics/__init__.py",
line 9, in <module>
    import epics
  File
"/Users/jterry/anaconda3/lib/python3.7/site-packages/epics/__init__.py",
line 29, in <module>
    from . import ca
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/epics/ca.py",
line 761, in <module>
    dbr.access_rights_handler_args)
  File "/Users/jterry/anaconda3/lib/python3.7/site-packages/epics/dbr.py",
line 339, in make_callback
    return ctypes.CFUNCTYPE(None, args)(func)
  File "/Users/jterry/anaconda3/lib/python3.7/ctypes/__init__.py", line
99, in CFUNCTYPE
    class CFunctionType(_CFuncPtr):
TypeError: item 1 in _argtypes_ passes a struct/union with a bitfield by
value, which is unsupported.
I think that line 11 is:  load_entry_point('xraylarch==0.9.46',
'console_scripts', 'larch')()
Any ideas on how to address this issue?
Thanks,
Jeff
Jeff Terry
Professor of Physics, Illinois Institute of Technology
terryj@iit.edu
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