I'm writing an app in Python with the PySide library. I have a QTableWidget that gets updated about every second. The thing is, I want to be able to change the data manually, and I thought that if I could find out whether or not the user is changing the data in the cell, then I could just prevent the program from updating this cell. Otherwise I get "kicked out" of the cell at each update.

Is this a good idea? Should I try something else and why?
How can I achieve my goal?

Many thanks

EDIT :
I know there exists an itemChanged signal, but what I'd really like to know is if there is a way to tell when the user is writing a new value in the cell, in order not to kick them out while editing.
In Qt Document:
void QTableWidget::itemChanged(QTableWidgetItem * item)
This signal is emitted whenever the data of item has changed.
Hope this will help you.
Edit:
QTableWidget uses a default itemdelegate(QItemDelegate instance) which has createEditor method and closeEditor signal.
You can reimplement createEditor which means edit starts, and connect the signal closeEditor which means the edit ends.
This may be the correct way.
How to tell when a QTableWidgetItem is being modified