[PyMOL] how to get RMSD from align command

[Thomas E. <te...@mb...>]

Simple question, it must have been answered before but couldn't find  
it so far:

how can I get the RMSD value from the align command in a python  
script? cmd.align() returnes a tuple of 8 numbers and none of them is  
the actual RMSD value I get when I align these 2 structures manually.

thanks,Tom