How to install python packages on Windows 7

Brief steps:

1. Download a package

2. Extract the package to a folder_pkg

3. Open Windows Command Prompt

4. Go to the folder_pkg

5. > python setup.py install

Then done. Check PythonHomeDir/Lib/site-packages

Useful packages:

1. simplejson: https://pypi.python.org/pypi/simplejson

2. XlsxWriter: https://pypi.python.org/pypi/XlsxWriter

An Detailed Example for installing XlsxWriter Package (TODO)