Can't open include file: 'io.h' when trying to set checkbox-bcrypt

I am getting the following error when I try to check the -bcrypt checkbox. I am using Windows and Python 2.7. How do I fix this error and install it?

Searching for flask-bcrypt
Best match: flask-bcrypt 0.6.2
Processing flask_bcrypt-0.6.2-py2.7.egg
flask-bcrypt 0.6.2 is already the active version in easy-install.pth

Using c:\python_examples\realpython\flasktaskr\env\lib\site-packages\flask_bcrypt-0.6.2-py2.7.egg
Processing dependencies for flask-bcrypt Searching for python-bcrypt
Reading ...
Best match: python-bcrypt 0.3.1
Downloading ...
Processing python-bcrypt-0.3.1.zip
Writing c:\users\2c46f~1.0\appdata\local\temp\easy_install-30gixg\python-bcrypt-0.3.1\setup.cfg
Running python-bcrypt-0.3.1\setup.py -q bdist_egg --dist-dir c:\users\2c46f~1.0\appdata\local\temp\easy_install-30gixg\python-bcrypt-0.3.1\egg-dist-tmp-v8alpt
bcrypt_python.c c:\python27\include\pyconfig.h(68) : fatal error
C1083: Cannot open include file: 'io.h': No such file or directory.

      

        
        
        
      

    

I visited this page and manually installed py-bcrypt but it didn't work for me.