To install PySide on Windows you can choose from the following options:
Download and install the packages from the releases page.
Use setuptools to install the egg binary packages:
c:> c:\Python27\Scripts\easy_install PySide
Use pip to install the wheel binary packages:
c:> c:\Python27\Scripts\pip install --use-wheel PySide
Details are here https://pypi.python.org/pypi/PySide#installing-pyside-on-a-windows-system
BTW: PyQt does not support setuptools or pip