thanks Alexey!
something still not working though.
when I load the reference is gives "true" massage like it worked but nothing changes
here is the command i write in the console :
myChunk.loadReference("D:\python\scripts\data.csv", 'csv' , columns='nxyzabc', delimiter=',')
and here is a sample of row in the file :
DJI_0039.JPG,6.118814,4.813623,86.700000,1.0,0.0,90.0