How to repeat a function call every X seconds in Pyqt?

Question

I am developing a small application in Pyqt4 where I need to upload the data to a table coming from a Webservice. This I managed to do quietly. However, now, I need that every 1 minute, these data be updated.

How can I do a repeat of a function call every X seconds in Pyqt4?

Is there anything specific to this in Pyqt? (something similar to Javascript setInterval)

_{Note: The data reload process in this interval has to be asynchronous}

Answer 1

One can use the QTimer of Qt. In the Pyqt4 documentation I did not find examples, but I believe it should look like this (every 1 second):

from PyQt4.QtCore import QTimer

def chamar():
    print 'Foo'

timer = QTimer()
timer.timeout.connect(chamar)
timer.start(1000)

Yet I believe it’s best to use singleShot, because if a function takes longer than the timeout there will be no chance of it being executed two or more simultaneously (which can cause conflicts and "crashes"), I believe it stays that way:

from PyQt4.QtCore import QTimer

def chamar():
    # Aqui fica o código que será executado

    timer = QTimer()
    timer.setSingleShot(True)
    timer.timeout.connect(chamar)
    timer.start(1000)

chamar()