[Python] Importing svm gives ValueError: numpy.dtype has the wrong size, try recompiling

I am trying to use scikit-learn svm to classify emails based on the topic. However, I am unable to import the svm module from sklearn. I already have sklearn installed. The error I get is as follows:

>>> from sklearn import svm

Traceback (most recent call last):
File "<pyshell#3>", line 1, in <module>
from sklearn import svm
File "C:\Python27\lib\site-packages\sklearn\svm\__init__.py", line 13, in <module>
from .classes import SVC, NuSVC, SVR, NuSVR, OneClassSVM, LinearSVC
File "C:\Python27\lib\site-packages\sklearn\svm\classes.py", line 1, in <module>
from .base import BaseLibLinear, BaseSVC, BaseLibSVM
File "C:\Python27\lib\site-packages\sklearn\svm\base.py", line 8, in <module>
from . import libsvm, liblinear
File "numpy.pxd", line 155, in init sklearn.svm.libsvm (sklearn\svm\libsvm.c:9096)
ValueError: numpy.dtype has the wrong size, try recompiling


How to resolve this?

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