Can't import Crypto.Cipher

[xxyzz]

I'm testing calibre 5.5 on linux and mac and get the following error:

$ calibre-debug
Welcome to the interactive calibre shell!
Use exit to quit
>>> from Crypto.Cipher import AES
Traceback (most recent call last):
  File "calibre/utils/ipython.py", line 191, in ipython
ModuleNotFoundError: No module named 'IPython'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "bypy-importer.py", line 154, in exec_module
  File "Crypto/Cipher/__init__.py", line 27, in <module>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "bypy-importer.py", line 154, in exec_module
  File "Crypto/Cipher/_mode_ecb.py", line 35, in <module>
  File "Crypto/Util/_raw_api.py", line 308, in load_pycryptodome_raw_lib
OSError: Cannot load native module 'Crypto.Cipher._raw_ecb': Trying '_raw_ecb.cpython-38-darwin.so': dlopen(/Applications/calibre.app/Contents/Frameworks/plugins/python-lib.bypy.frozen/Crypto/Util/../Cipher/_raw_ecb.cpython-38-darwin.so, 6): no suitable image found.  Did find:
        /Applications/calibre.app/Contents/Frameworks/plugins/python-lib.bypy.frozen/Crypto/Util/../Cipher/_raw_ecb.cpython-38-darwin.so: stat() failed with errno=20, Trying '_raw_ecb.abi3.so': dlopen(/Applications/calibre.app/Contents/Frameworks/plugins/python-lib.bypy.frozen/Crypto/Util/../Cipher/_raw_ecb.abi3.so, 6): no suitable image found.  Did find:
        /Applications/calibre.app/Contents/Frameworks/plugins/python-lib.bypy.frozen/Crypto/Util/../Cipher/_raw_ecb.abi3.so: stat() failed with errno=20, Trying '_raw_ecb.so': dlopen(/Applications/calibre.app/Contents/Frameworks/plugins/python-lib.bypy.frozen/Crypto/Util/../Cipher/_raw_ecb.so, 6): no suitable image found.  Did find:
        /Applications/calibre.app/Contents/Frameworks/plugins/python-lib.bypy.frozen/Crypto/Util/../Cipher/_raw_ecb.so: stat() failed with errno=20

I find pycryptodome in the /bypy/sources.json file so I guess calibre should have this library but don't know why I can't use it.

[kovidgoyal]

because pycryptodome does some silly ctypes/cffi based nonsense to load native modules instead of using the python import mechanism. That's not going to work with a frozen python build.

[kovidgoyal]

and this will fix it: https://github.com/kovidgoyal/calibr...1fad25ccc1f4bf

[xxyzz]

Thanks! I was suspect it has something to do with bypy but didn't see that `return {}`.