[Qgis-user] Creating Polygon Vector Layer from specific .csv file

[Marcin]

Hi folks,

QGIS 3.10

I would like to create polygons (see 4 corners everyone) with Python form .csv like that:

LP	CORNER	Y	X
1	1	51.558868	21.696985
1	2	51.596337	21.745589
1	3	51.603166	21.727687
1	4	51.565424	21.682416
2	1	51.590928	21.760442
2	2	51.553125	21.709847
2	3	51.559536	21.6959
2	4	51.598023	21.742078
3	1	51.548047	21.724327
3	2	51.586238	21.773843
3	3	51.593172	21.756185
3	4	51.554643	21.709932

According to QGIS Python Programming Cookbook 

I know how to load csv file:

uri = "D:/PODYPLOM/plikiCSVtoSHPviaPythonpokrycieCSV.csv?"
uri += "type=csv&"
uri += "xField=X&yField=Y&"
uri += "spatialIndex=no&"
uri += "subsetIndex=no&"
uri += "watchFile=no&"
uri += "crs=epsg:4326"
layer=QgsVectorLayer(uri,"Tourism Sites","delimitedtext")
QgsProject.instance().addMapLayers([layer])

and I know how to create polygon layer from points added by finger:

vectorLyr = QgsVectorLayer('D:/qgis_data/polygon/polygon.shp', 'Polygon', "ogr")
vpr = vectorLyr.dataProvider()
points = []
points.append(QgsPointXY(-123.26,49.06))
points.append(QgsPointXY(-127.19,43.07))
points.append(QgsPointXY(-120.70,35.21))
points.append(QgsPointXY(-115.89,40.02))
points.append(QgsPointXY(-123.26,49.06))
poly = QgsGeometry.fromPolygonXY([points])
f = QgsFeature()
f.setGeometry(poly)
vpr.addFeatures([f])
vectorLyr.updateExtents()

but I can't load points from csv to line: points.append(QgsPointXY())

Anybody can help me how to do this ?

Cheers, Marcin Pietruszewski