QtPy is a compatibility layer which allows to use the code written for
PyQt5 with any python Qt binding: PyQt4, PyQt5, pyside or pyside2.
Main differences in PyQt5:
- all widget classes are now in QtWidgets package, not QtGui;
- QString obsoleted by unicode (sip API 2);
- changed the way of signals connection.
* Some local pickle operations and non-cryptographic random operations
were marked as safe to the bandit linter
* A bandit config file was added and assert warnings are now ignored globally
* Tightened up exception handling and code style
