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¿Cómo instalar numpy en Python 2.7 en virtualenv?

tag-icon • tag-icon python cygwin virtualenv
¿Cómo instalar numpy en Python 2.7 en virtualenv?

Estoy intentando instalar numpyen ( Python 2.7en virtualenvCygwin).
Sin embargo, cuando lo intento import numpy, aparece un ImportError:

Administrator@Ron ~/python/virtualenv
$ virtualenv -p /usr/bin/python2.7.exe machine_learning
Running virtualenv with interpreter /usr/bin/python2.7.exe
New python executable in /home/Administrator/python/virtualenv/machine_learning/bin/python2.7
Also creating executable in /home/Administrator/python/virtualenv/machine_learning/bin/python
Installing setuptools, pip, wheel...done.

Administrator@Ron ~/python/virtualenv
$ source machine_learning/bin/activate
(machine_learning)
Administrator@Ron ~/python/virtualenv
$ pip2 install numpy
Collecting numpy
Installing collected packages: numpy
Successfully installed numpy-1.13.0
(machine_learning)
Administrator@Ron ~/python/virtualenv
$ python2 -c "import numpy"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/lib/__init__.py", line 19, in <module>
    from .polynomial import *
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/lib/polynomial.py", line 20, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/linalg/__init__.py", line 51, in <module>
    from .linalg import *
  File "/home/Administrator/python/virtualenv/machine_learning/lib/python2.7/site-packages/numpy/linalg/linalg.py", line 30, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: No such file or directory
(machine_learning)
Administrator@Ron ~/python/virtualenv

¿Alguna sugerencia sobre cómo instalar numpy en Python 2.7 en virtualenv?

Nota:
La versión Python3 de Cygwin es 3.6 y parece que pypi numpy aún no está lista para 3.6.

Edición 1:

En respuesta amatzeriComo comentario, lo desinstalé numpyde pip3 y pip2, y lo instalé numpypara Python 3 y Python 2 desde setup.exe de Cygwin.
Los siguientes son los errores que recibo para numpy cuando intento importarlo posteriormente:

$ python3 -c "import numpy"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.6/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/usr/lib/python3.6/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/usr/lib/python3.6/site-packages/numpy/lib/__init__.py", line 18, in <module>
    from .polynomial import *
  File "/usr/lib/python3.6/site-packages/numpy/lib/polynomial.py", line 20, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/usr/lib/python3.6/site-packages/numpy/linalg/__init__.py", line 51, in <module>
    from .linalg import *
  File "/usr/lib/python3.6/site-packages/numpy/linalg/linalg.py", line 29, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: No such file or directory

$ python2 -c "import numpy"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/usr/lib/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/usr/lib/python2.7/site-packages/numpy/lib/__init__.py", line 18, in <module>
    from .polynomial import *
  File "/usr/lib/python2.7/site-packages/numpy/lib/polynomial.py", line 20, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/usr/lib/python2.7/site-packages/numpy/linalg/__init__.py", line 51, in <module>
    from .linalg import *
  File "/usr/lib/python2.7/site-packages/numpy/linalg/linalg.py", line 29, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: No such file or directory

Respuesta1

Instale el paquete python2-numpycon la configuración de cygwin. No necesitas pip para instalarlo.

python2 -c "import numpy"funciona para mi.
Como el problema parece resuelto, lapack_liteverifique que lo tenga /usr/lib/lapack/en su camino.

$ cygcheck -l liblapack0
/etc/profile.d/lapack0.csh
/etc/profile.d/lapack0.sh
/usr/lib/lapack/cygblas-0.dll
/usr/lib/lapack/cyglapack-0.dll


 $ cygcheck /usr/lib/python2.7/site-packages/numpy/linalg/lapack_lite.dll | grep -v Windows
E:\cygwin64\lib\python2.7\site-packages\numpy\linalg\lapack_lite.dll
  E:\cygwin64\bin\cygwin1.dll
  E:\cygwin64\lib\lapack\cyglapack-0.dll
    E:\cygwin64\bin\cyggcc_s-seh-1.dll
    E:\cygwin64\bin\cyggfortran-3.dll
      E:\cygwin64\bin\cygquadmath-0.dll
    E:\cygwin64\bin\cygblas-0.dll
  E:\cygwin64\bin\libpython2.7.dll

De lo contrario la biblioteca lapack no estará operativa.

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