Numpy import throws AttributeError: 'module' 对象没有属性 'core'

import numpy as np

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/__init__.py", line 180, in <module>

 from . import add_newdocs

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>

 from numpy.lib import add_newdoc

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/lib/__init__.py", line 8, in <module>

 from .type_check import *

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/lib/type_check.py", line 11, in <module>

 import numpy.core.numeric as _nx

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/core/__init__.py", line 57, in <module>

 from numpy.testing import Tester

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/testing/__init__.py", line 14, in <module>

 from .utils import *

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/testing/utils.py", line 15, in <module>

 from tempfile import mkdtemp

 File "/usr/lib/python2.7/tempfile.py", line 35, in <module>

 from random import Random as _Random

 File "/home/anirrudh/OMSCS/Courses/ML4T/ml4t/mc3_p2/random.py", line 5, in <module>

 import matplotlib.pyplot as plt

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/matplotlib/__init__.py", line 122, in <module>

 from matplotlib.cbook import is_string_like, mplDeprecation, dedent, get_label

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/matplotlib/cbook.py", line 33, in <module>

 import numpy.ma as ma

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/ma/__init__.py", line 44, in <module>

 from . import core

 File "/home/anirrudh/.virtualenvs/ml4t2/local/lib/python2.7/site-packages/numpy/ma/core.py", line 30, in <module>

 import numpy.core.umath as umath

AttributeError: 'module' object has no attribute 'core'

我工作NAD. Ubuntu 14.04. 我试图重新安装 numpy, 创造了新的 virtualenv, 但它没有帮助。 我得到了同样的错误和外面 virtualenv. 他突然停止工作。 前段时间很好。
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