<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000'><font face="times new roman, new york, times, serif" size="3">Hi list,</font><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">I try to use the multiprocessing module in a plugin, in order to increase the calculation speed.</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">I use the Poll class and the apply_async method with a function that use a layer: </div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;">pool.</span><span style="font-size: 12pt;">apply_async(function, layer)</span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;"><br></span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;">But I have the following error: </span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">RuntimeError: <span style="font-size: 12pt;">super-class __init__() of type QgsFeature was never called</span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;"><br></span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;">Is there someone who has tried the multiprocessing module in Qgis?</span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;"><br></span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;">Thanks.</span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;"><br></span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><span style="font-size: 12pt;">Stefano</span></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br><span style="font-size: 12pt;"></span></div></div></body></html>