在OSX 10.6.8上安裝后無法導入PyBrain

Question

檢查python版本

✈  python --version
Python 2.7.2

列出virtualenv的軟件包

✈  pip freeze
PyBrain==0.3
numpy==1.6.1
scipy==0.10.1
wsgiref==0.1.2

加載解釋器

>>> import numpy
>>> print numpy.__version__
1.6.1
>>> import scipy
>>> print scipy.__version__
0.10.1
>>> import pybrain
 Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/pybrain/__init__.py", line 1, in <module>
from structure.__init__ import *
  File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/pybrain/structure/__init__.py", line 2, in <module>
from modules.__init__ import *
  File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/pybrain/structure/modules/__init__.py", line 2, in <module>
from gate import GateLayer, DoubleGateLayer, MultiplicationLayer, SwitchLayer
  File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/pybrain/structure/modules/gate.py", line 11, in <module>
from pybrain.tools.functions import sigmoid, sigmoidPrime
  File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/pybrain/tools/functions.py", line 4, in <module>
from scipy.linalg import inv, det, svd
  File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/scipy/linalg/__init__.py", line 116, in <module>
from basic import *
  File "/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/scipy/linalg/basic.py", line 14, in <module>
from scipy.linalg import calc_lwork
ImportError: dlopen(/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/scipy/linalg/calc_lwork.so, 2): Symbol not found: __gfortran_concat_string
  Referenced from: /Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/scipy/linalg/calc_lwork.so
  Expected in: dynamic lookup

Answer 1

ImportError: dlopen(/Users/milktrader/.virtualenvs/pybrain/lib/python2.7/site-packages/scipy/linalg/calc_lwork.so, 2): Symbol not found: __gfortran_concat_string

我不確定-因為我以前沒有弄過這個庫-但是您是否需要在Fortran支持下編譯其中一個軟件包？ 當我在Mac上安裝numpy / scipy時，我必須安裝GFortran，以便正確設置框架的所有綁定和基礎。 也許這就是scipy垂死於你的原因。

Answer 2

可能是因為在OSX python上默認未安裝scipy。

試試這個來證明

>>> import scipy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named scipy
>>>