usage: Usage: e2a2d_masks.py <mask1> <mask2> ... [options] 
	This program takes the results of e2a2d_align and computes statistics under one or more masks on the aligned particles.

Option Type Description
--version None show program's version number and exit
--path str Path to a folder with existing e2a2d_align results (default = 2da_XX)
--iter int Iteration number within path. Default = highest existing iteration
--extract None If set, will also produce a .txt file for plotting with all of the per-particle statistics
--verbose, -v int verbose level [0-9], higher number means higher level of verboseness
--ppid int Set the PID of the parent process, used for cross platform PPID