[python] Installing Numpy on 64bit Windows 7 with Python 2.7.3

It looks like the only 64 bit windows installer for Numpy is for Numpy version 1.3.0 which only works with Python 2.6

http://sourceforge.net/projects/numpy/files/NumPy/

It strikes me as strange that I would have to roll back to Python 2.6 to use Numpy on Windows, which makes me think I'm missing something.

Am I?

Assuming you have python 2.7 64bit on your computer and have downloaded numpy from here, follow the steps below (changing numpy-1.9.2+mkl-cp27-none-win_amd64.whl as appropriate).

1. Download (by right click and "save target") get-pip to local drive.
   
   

2. At the command prompt, navigate to the directory containing get-pip.py and run
   
   python get-pip.py
   
   which creates files in C:\Python27\Scripts, including pip2, pip2.7 and pip.
   
   

3. Copy the downloaded numpy-1.9.2+mkl-cp27-none-win_amd64.whl into the above directory (C:\Python27\Scripts)
   
   

4. Still at the command prompt, navigate to the above directory and run:
   
   pip2.7.exe install "numpy-1.9.2+mkl-cp27-none-win_amd64.whl"

You may also try this, anaconda http://continuum.io/downloads

But you need to modify your environment variable PATH, so that the anaconda folder is before the original Python folder.

Download numpy-1.9.2+mkl-cp27-none-win32.whl from http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy .

Copy the file to C:\Python27\Scripts

Run cmd from the above location and type

pip install numpy-1.9.2+mkl-cp27-none-win32.whl

You will hopefully get the below output:

Processing c:\python27\scripts\numpy-1.9.2+mkl-cp27-none-win32.whl
Installing collected packages: numpy
Successfully installed numpy-1.9.2

Hope that works for you.

EDIT 1
Adding @oneleggedmule 's suggestion:

You can also run the following command in the cmd:

pip2.7 install numpy-1.9.2+mkl-cp27-none-win_amd64.whl

Basically, writing pip alone also works perfectly (as in the original answer). Writing the version 2.7 can also be done for the sake of clarity or specification.

The (unofficial) binaries (http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy) worked for me.
I've tried Mingw, Cygwin, all failed due to varies reasons. I am on Windows 7 Enterprise, 64bit.

It is not improbable, that programmers looking for python on windows, also use the Python Tools for Visual Studio. In this case it is easy to install additional packages, by taking advantage of the included "Python Environment" Window. "Overview" is selected within the window as default. You can select "Pip" there.

Then you can install numpy without additional work by entering numpy into the seach window. The coresponding "install numpy" instruction is already suggested.

Nevertheless I had 2 easy to solve Problems in the beginning:

• "error: Unable to find vcvarsall.bat": This problem has been solved here. Although I did not find it at that time and instead installed the C++ Compiler for Python.
• Then the installation continued but failed because of an additional inner exception. Installing .NET 3.5 solved this.

Finally the installation was done. It took some time (5 minutes), so don't cancel the process to early.