[PyQt] simple charts with PyQT

[bar tomas]

Hi,
I was just wondering if someone could advise me on the simplest way of
integrating a few simple charts (pie chart, time series chart, etc)
into my PyQT application.
Are there any chart widget libraries accessible through PyQT? Can they
be used through QT Designer?
Is it easier to just paint the charts onself, are there any examples
of this in PyQT code?
Thanks a million for any help.

Tomas Bar