can not import "from abc import ABC"

[kongkongruye]

My python env is 2.7

---

ImportError Traceback (most recent call last)
in ()
----> 1 from modAL.models import ActiveLearner
2 from sklearn.neighbors import KNeighborsClassifier
3
4 # initializing the active learner
5 learner = ActiveLearner(

/usr/local/lib/python2.7/dist-packages/modAL/init.py in ()
----> 1 from .models import ActiveLearner, Committee, CommitteeRegressor
2 from .uncertainty import classifier_uncertainty, classifier_margin, classifier_entropy,
3 uncertainty_sampling, margin_sampling, entropy_sampling
4 from .disagreement import vote_entropy, consensus_entropy, KL_max_disagreement,
5 vote_entropy_sampling, consensus_entropy_sampling, max_disagreement_sampling, max_std_sampling

/usr/local/lib/python2.7/dist-packages/modAL/models.py in ()
4
5 import numpy as np
----> 6 from abc import ABC, abstractmethod
7 from sklearn.utils import check_array
8 from sklearn.base import BaseEstimator

ImportError: cannot import name ABC

[kongkongruye]

I have modified /usr/local/lib/python2.7/dist-packages/modAL/models.py, it works.

6c6
< from abc import ABC, abstractmethod
---
> from abc import ABCMeta, abstractmethod
313c313
< class BaseCommittee(ABC):
---
> class BaseCommittee(ABCMeta):

[cosmic-cortex]

Thanks! I'll try to add more Python 2.7 support and I'll fix this problem soon!

Update: I have added a few lines which should fix the problem, but haven't merged to master yet, you can find it in the dev branch.