PyQT里没有Qt的QString，QList，QStringList等

因为Qt是C++实现的，所以有List等概念的对象。但对于PyQt，因为python本身支持List等，所以就没有这个对象了。

in PyQt, there is no QString and hence no need for QStringList.

Any Qt API that would normally return a QString, will automatically return a Python string instead. Similarly, any Qt APIs that would normally return a QStringList will return a Python list containing Python strings. And the opposite also applies: any Qt API that would normally accept a QString or QStringList will accept the Python equivalents instead.