Python SciPy是否需要BLAS?

numpy.distutils.system_info.BlasNotFoundError: Blas (http://www.netlib.org/blas/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [blas]) or by setting the BLAS environment variable. 我需要从该站点下载哪个tar? 我已经尝试过fortrans,但是一直出现此错误(明显地设置了环境变量之后)。