from mapscript import mapObj,layerObj
wkt = '''PROJCS["Mercury_Albers_AUTO",GEOGCS["Mercury 2000",DATUM["D_Mercury_2000",SPHEROID["Mercury_2000_IAU_IAG",2439700.0,0.0]],PRIMEM["Greenwich",0],UNIT["Decimal_Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",20.0],PARAMETER["Standard_Parallel_2",-20.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1]]'''
m = mapObj('')
m.setWKTProjection(wkt)
lyr = layerObj(m)
lyr.setWKTProjection(wkt)