orange3：ImportError：無法導入名稱'_variable'

Question

我想在我的Mac上使用Orange3，但出現此錯誤：ImportError: cannot import name '_variable'。

這是我的設置：

$ cd orange_playground 
$ virtualenv -p python3 venv 
$ pip install orange3 
$ source venv/bin/activate 
$ python 

輸出如下：從orange_playground/venv/lib/python3.4/site-packages/Orange/data/variable.py的代碼

Python 3.4.2 (default, Oct 8 2014, 19:29:52) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.51)] on darwin 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import Orange 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "orange_playground/venv/lib/python3.4/site-packages/Orange/__init__.py", line 11, in <module> 
    from .misc.lazy_module import _LazyModule 
    File "orange_playground/venv/lib/python3.4/site-packages/Orange/misc/__init__.py", line 3, in <module> 
    from .distmatrix import DistMatrix 
    File "orange_playground/venv/lib/python3.4/site-packages/Orange/misc/distmatrix.py", line 3, in <module> 
    from Orange.data import Table, StringVariable, Domain 
    File "orange_playground/venv/lib/python3.4/site-packages/Orange/data/__init__.py", line 4, in <module> 
    from .variable import * 
    File "orange_playground/venv/lib/python3.4/site-packages/Orange/data/variable.py", line 11, in <module> 
    from Orange.data import _variable 
ImportError: cannot import name '_variable' 

第一線：

import collections 
import re 

from datetime import datetime, timedelta, timezone 
from numbers import Number, Real, Integral 
from math import isnan, floor 
from pickle import PickleError 

import numpy as np 

from Orange.data import _variable 
from Orange.util import Registry, color_to_hex, hex_to_color 

__all__ = ["Unknown", "MISSING_VALUES", "make_variable", "is_discrete_values", 
      "Value", "Variable", "ContinuousVariable", "DiscreteVariable", 
      "StringVariable", "TimeVariable"] 


# For storing unknowns 
Unknown = ValueUnknown = float("nan") 
# For checking for unknowns 
MISSING_VALUES = {np.nan, "?", "nan", ".", "", "NA", "~", None} 

... 

任何想法怎麼辦？

Answer 1

Installing Orange3 from source像@MartijnPieters建議作品！謝謝。