/usr/include/PySide/ is in libpyside-dev 1.2.2+source1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/PySide/QtCore/
/usr/include/PySide/QtCore/pyside_qtcore_python.h
/usr/include/PySide/QtDeclarative/
/usr/include/PySide/QtDeclarative/pyside_qtdeclarative_python.h
/usr/include/PySide/QtGui/
/usr/include/PySide/QtGui/pyside_qtgui_python.h
/usr/include/PySide/QtGui/qpytextobject.h
/usr/include/PySide/QtHelp/
/usr/include/PySide/QtHelp/pyside_qthelp_python.h
/usr/include/PySide/QtNetwork/
/usr/include/PySide/QtNetwork/pyside_qtnetwork_python.h
/usr/include/PySide/QtOpenGL/
/usr/include/PySide/QtOpenGL/pyside_qtopengl_python.h
/usr/include/PySide/QtScript/
/usr/include/PySide/QtScript/pyside_qtscript_python.h
/usr/include/PySide/QtScriptTools/
/usr/include/PySide/QtScriptTools/pyside_qtscripttools_python.h
/usr/include/PySide/QtSql/
/usr/include/PySide/QtSql/pyside_qtsql_python.h
/usr/include/PySide/QtSvg/
/usr/include/PySide/QtSvg/pyside_qtsvg_python.h
/usr/include/PySide/QtTest/
/usr/include/PySide/QtTest/pyside_qttest_python.h
/usr/include/PySide/QtUiTools/
/usr/include/PySide/QtUiTools/pyside_qtuitools_python.h
/usr/include/PySide/QtWebKit/
/usr/include/PySide/QtWebKit/pyside_qtwebkit_python.h
/usr/include/PySide/QtXml/
/usr/include/PySide/QtXml/pyside_qtxml_python.h
/usr/include/PySide/QtXmlPatterns/
/usr/include/PySide/QtXmlPatterns/pyside_qtxmlpatterns_python.h
/usr/include/PySide/destroylistener.h
/usr/include/PySide/dynamicqmetaobject.h
/usr/include/PySide/globalreceiver.h
/usr/include/PySide/phonon/
/usr/include/PySide/phonon/pyside_phonon_python.h
/usr/include/PySide/pyside.h
/usr/include/PySide/pyside_global.h
/usr/include/PySide/pysideclassinfo.h
/usr/include/PySide/pysideconversions.h
/usr/include/PySide/pysidemacros.h
/usr/include/PySide/pysidemetafunction.h
/usr/include/PySide/pysideproperty.h
/usr/include/PySide/pysideqflags.h
/usr/include/PySide/pysidesignal.h
/usr/include/PySide/pysideweakref.h
/usr/include/PySide/signalmanager.h