Error occuring in setup.py ,due to which ipython notebook is notworking about optical-flow-filter HOT 8 CLOSED

what is your cython version?

cython --version

from optical-flow-filter.

from optical-flow-filter.

I upgraded my machine to Cython 0.28.2 and now I'm having trouble compiling the Python wrappers. When I run ptyhon setup.py build I get get following error:

Traceback (most recent call last):
  File "setup.py", line 80, in <module>
    extList = cythonize(createExtension(mod[0], mod[1]), compiler_directives=cython_directives)
  File "/usr/local/lib/python2.7/dist-packages/Cython/Build/Dependencies.py", line 897, in cythonize
    aliases=aliases)
  File "/usr/local/lib/python2.7/dist-packages/Cython/Build/Dependencies.py", line 719, in create_extension_list
    elif isinstance(patterns, basestring) or not isinstance(patterns, collections.Iterable):
  File "/usr/lib/python2.7/abc.py", line 144, in __instancecheck__
    return cls.__subclasscheck__(subtype)
  File "/usr/lib/python2.7/abc.py", line 180, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/usr/lib/python2.7/abc.py", line 180, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/usr/lib/python2.7/abc.py", line 161, in __subclasscheck__
    ok = cls.__subclasshook__(subclass)
  File "/usr/local/lib/python2.7/dist-packages/backports_abc.py", line 66, in __subclasshook__
    mro = C.__mro__
AttributeError: class Extension has no attribute '__mro__'

I will check what's happening and fix it.

from optical-flow-filter.

from optical-flow-filter.

This is a problem with Cython 0.28.2. I tried downgrading to version 0.23.5 and the build process completes successfully. This is a known issue: cython/cython#1507

You can downgrade Cython as follows:

Uninstall current version:

sudo pip uninstall cython

or

sudo apt remove python-cython

depending on how you installed it.

Then you can install the proper version as follows

sudo pip install cython==0.23.5

from optical-flow-filter.

I downgraded Cython, but still it is showing the same error after sudo python setup.py install. Also the same warnings are coming after running command python setup.py build. One more thing, when i executed the command sudo pip uninstall cython it was showing following error;
sudo: pip: command not found
so that is why i used pip uninstall cython and thus it got uninstalled. Same happened for `sudo pip cython==0.23.5 and i fixed it in the same way.

from optical-flow-filter.

Could you confirm the new Cython version? From the comment above, you didn't have pip installed in your machine. As mentioned above, using Cython 0.23.5 works fine.

from optical-flow-filter.

Sorry for the late reply Jaden, but the issue is solved now, one of my senior solved it. Thanks for your time and help!!!

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