This script shows how to rotate an Element around an axis. The rotation can be done in the local space of the Element (LCS) or the global space of the scene (WCS). The rotation axis is defined by the Geom.Ax1 class. All angles are in radians.

import Base, Geom
import OpenLxApp as lx
import OpenLxUI as ui

import math
app = lx.Application.getInstance()
doc = app.getActiveDocument()

#--------------------
# Creating first Block.
#--------------------
block1 = lx.Block.createIn(doc)
elem1 = lx.Element.createIn(doc)
elem1.setGeometry(block1)

origin1 = Geom.Pnt(5, 0, 0)
zDir1 = Geom.Dir(0, 0, 1)
xDir1 = Geom.Dir(1, 0, 0)

axis1 = Geom.Ax2(origin1, zDir1, xDir1)
elem1.setLocalPlacement(axis1)

red = 255; green = 0; blue = 0;
myColor = Base.Color(red, green, blue)
elem1.setDiffuseColor(myColor)

#---------------------
# Creating second Block.
#---------------------
block2 = lx.Block.createIn(doc)
elem2 = lx.Element.createIn(doc)
elem2.setGeometry(block2)

origin2 = Geom.Pnt(5, 0, 0)
zDir2 = Geom.Dir(0, 0, 1)
xDir2 = Geom.Dir(1, 0, 0)

axis2 = Geom.Ax2(origin2, zDir2, xDir2)
elem2.setLocalPlacement(axis2)

#-------------------------------------------------------------------------------
# An element can be rotated around an axis, according to its local coordinates 
# system (LCS) or the world coordinate system (WCS).
#-------------------------------------------------------------------------------
ang = math.radians(45)
rotationPoint = Geom.Pnt(0, 0, 0)

xAxis = Geom.Ax1(rotationPoint, Geom.Dir(1, 0, 0))
yAxis = Geom.Ax1(rotationPoint, Geom.Dir(0, 1, 0))
zAxis = Geom.Ax1(rotationPoint, Geom.Dir(0, 0, 1))

elem1.rotate(xAxis, ang, Geom.CoordSpace_LCS) # Rotating the first Block (LCS)
elem1.rotate(yAxis, ang, Geom.CoordSpace_LCS) #
elem1.rotate(zAxis, ang, Geom.CoordSpace_LCS) #

elem2.rotate(xAxis, ang, Geom.CoordSpace_WCS) # Rotating the second Block (WCS)
elem2.rotate(yAxis, ang, Geom.CoordSpace_WCS) #
elem2.rotate(zAxis, ang, Geom.CoordSpace_WCS) #

#----------------------
# See the difference...
#----------------------
doc.recompute()