Collecting zbar Using cached https://files.pythonhosted.org/packages/33/54/cc5819efc9ee7e34b60b41e1d2d4753b6dd0c26a41c9a552611f66aa106e/zbar-0.10.tar.bz2
Installing collected packages: zbar Running setup.py install for zbar ... error
Complete output from command c:\python27\python.exe -u -c "import setuptools, tokenize;file='c:\users\k\appdata\local\temp\pip-build-y0jgcd\zbar\setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record c:\users\k\appdata\local\temp\pip-labpqj-record\install-record.txt --single-version-externally-managed --compile: running install running build running build_ext building 'zbar' extension error: INCLUDE environment variable is empty
Command "c:\python27\python.exe -u -c "import setuptools, tokenize;file='c:\users\k\appdata\local\temp\pip-build-y0jgcd\zbar\setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" install --record c:\users\k\appdata\local\temp\pip-labpqj-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in c:\users\k\appdata\local\temp\pip-build-y0jgcd\zbar\
how to fix this problem
