How to install snappy C libraries on Windows 10 for use with python-snappy in Anaconda?

问题:

I want to install parquet for python using pip within an Anaconda 2 installation on Windows 10.

While installing I ran into the error that is described here, the installer can't find snappy-c.h.

There is no mention on how to install this on Windows in the answers.

I downloaded the Snappy library from http://google.github.io/snappy/ and now I'm stuck.

From my error message I would have assumed that the header files need to be in C:\Users\...\AppData\Local\Continuum\Anaconda2\include, but in the downlaoded archive header and library files are just all in the same folder.

How do I install these properly in the Anaconda folder?

Full error message:

Building wheels for collected packages: python-snappy   Running setup.py bdist_wheel for python-snappy ... error   Complete output from command C:\Users\...\AppData\Local\Continuum\Anaconda2\python.exe -u -c "import setup tools, tokenize;__file__='c:\\users\\...\\appdata\\local\\temp\\pip-build-kl4zef\\python-snappy\\setup.py';f=ge tattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec '))" bdist_wheel -d c:\users\...\appdata\local\temp\tmpt8fz9bpip-wheel- --python-tag cp27:   running bdist_wheel   running build   running build_py   creating build   creating build\lib.win-amd64-2.7   copying snappy.py -> build\lib.win-amd64-2.7   running build_ext   building '_snappy' extension   creating build\temp.win-amd64-2.7   creating build\temp.win-amd64-2.7\Release   C:\Users\...\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\VC\Bin\amd64\cl.exe /c /nol ogo /Ox /MD /W3 /GS- /DNDEBUG -IC:\Users\...\AppData\Local\Continuum\Anaconda2\include -IC:\Users\... \AppData\Local\Continuum\Anaconda2\PC /Tpsnappymodule.cc /Fobuild\temp.win-amd64-2.7\Release\snappymodule.obj   snappymodule.cc   snappymodule.cc(31) : fatal error C1083: Cannot open include file: 'snappy-c.h': No such file or directory   error: command 'C:\\Users\\...\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\V C\\Bin\\amd64\\cl.exe' failed with exit status 2 

回答1:

After a really long and frustrating time trying different methods to get the C files working, I found this site:

http://www.lfd.uci.edu/~gohlke/pythonlibs/

Where C. Gohlke has kindly compiled and uploaded the files for us windows users.

Just download the version you need based on your system and python version. I am using 64bits and python 3.6, so I used the following command from my download folder:

pip install python_snappy-0.5-cp36-cp36m-win_amd64.whl 

It worked like a charm :)

回答2:

Here's the steps it took me to install Snappy and Python-Snappy on Windows 10:

1. Install cygwin.
2. Download snappy from http://google.github.io/snappy/ and unpack it somewhere into the cygwin directory.
3. Write AM_PROG_AR into configure.ac above LT_INIT and run autogen.sh from the cygwin terminal, install missing cygwin packages if needed.
4. Copy snappy-c.h into the Anaconda2/include folder and libsnappy.a into the Anaconda2/Lib folder (in ~/AppData/Local/Continuum/).
5. stdint.h was missing for Visual C++ Compiler for Python 2.7., I found it here and put it into ~\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\VC\include.
6. Installing python-snappy should now work without throwing any errors.
7. If you get problems and weird imports check if the SnapPy library is also installed and deinstall it because it causes a conflict.

(Everything works fine now.)

EDIT: No it does not. This method is not reliable, once you try to update you run into new problems. And installing on Python 3 is another monster that isn't tackled by this solution.

回答3:

It seems there are now Conda packages that should simplify things (in Anaconda). I was able to do (on Python 3.6, Windows 10):

conda install -c conda-forge snappy conda install -c conda-forge python-snappy 

文章来源: How to install snappy C libraries on Windows 10 for use with python-snappy in Anaconda?