I want to use a script to select elements by circular selection and write out the result table.

The following is an example in Python script.

This sample creates a mesh group to select elements.
# -*- coding: utf-8 -*-

app = designer.GetApplication()

#Circular Selection Settings

inner = 0 # Inner diameter of circle

outer = 28 # Outer diameter of circle

startAngle = 0 # Start angle

endAngle = 360 # End angle

useheight_flg = 0 # Whether height is used or not (0: no height specified, 1: height specified)

top = 0 # Cylindrical top height

bottom = 0 # Cylindrical bottom height

visible_flg = 0 # Whether the hidden object is also selected or not (0: also select the hidden object, 1: do not select the hidden object)

# The following is obtained by the Point object to set the coordinates.

P1 = app.CreatePoint(0, 0, 0) # Center point of circle (X,Y,Z)

P2 = app.CreatePoint(0, 0, 1) # Center position of axis (X,Y,Z)

P3 = app.CreatePoint(1, 0, 0) # Position of X axis (X,Y,Z)

#Display mesh & select elements

app.View().ShowMesh()

app.View().SelectElement()

# Create dammy mesh groups

app.GetModel(0).GetStudy(0).GetMeshGroupList().CreateElementGroup()

app.GetModel(0).GetStudy(0).GetMeshGroupList().GetMeshGroup(0).SetName(u"dammy")

# Circular selection of elements in the dammy group

P4 = app.GetModel(0).GetStudy(0).GetMeshGroupList().GetMeshGroup(0).GetSelection()

P4.SelectElementByCylinder(P1,P2,P3,inner,outer,startAngle,endAngle,useheight_flg,top,bottom,visible_flg)

# Setting up result tables for output

parameter = app.GetCurrentStudy().CreateTableDefinition()

parameter.SetResultType("MagneticFluxDensity")

parameter.SetCoordinate("Global Rectangular")

parameter.SetComponent("All")

parameter.SetAllSteps()

parameter.SetIsShownMinMaxInfo(True)

parameter.SetIsShownPositionInfo(True)

# Output results to csv with above settings

app.GetCurrentStudy().ExportTable(parameter, u"D:xxx.csv", 0)