I need to transform QgsVectorLayers in python from one crs into another crs. By googling I found the following solution (https://qgis.readthedocs.org/en/latest/docs/pyqgis_developer_cookbook/05_crs.html), which works for points only:

crsSrc = QgsCoordinateReferenceSystem(4326)    # WGS 84
crsDest = QgsCoordinateReferenceSystem(32633)  # WGS 84 / UTM zone 33N
xform = QgsCoordinateTransform(crsSrc, crsDest)
pt1 = xform.transform(QgsPoint(18,5))

Is there a way to make a crs transformation of an entire layer?

I need to transform QgsVectorLayers in PyQGIS from one CRS into another. By googling I found the following solution PyQGIS Developer Cookbook, which works for points only:

crsSrc = QgsCoordinateReferenceSystem(4326)    # WGS 84
crsDest = QgsCoordinateReferenceSystem(32633)  # WGS 84 / UTM zone 33N
xform = QgsCoordinateTransform(crsSrc, crsDest)
pt1 = xform.transform(QgsPoint(18, 5))

Is there a way to make a CRS transformation of an entire layer?