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<font size="4">My intention was to create a new vector layer
consisting of several polygons. I used the CreatePolygon tool to
mark the four vertices of a rectangle. I must have done something
wrong because I've ended up with a polygon that seems to belong to
no layer. In desperation I ran the following python code, hoping
to delete the mysterious polygon, but it's still there. Are some
layers not in the legend? How do I get rid of the polygon? <br>
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from qgis.core import QgsProject<br>
from qgis.utils import iface<br>
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project = QgsProject.instance()<br>
for lyr in project.mapLayers().values(): <br>
lyrName = lyr.name()<br>
print (lyrName)<br>
QgsProject.instance().removeMapLayers([lyr.id()]) <br>
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