def post_init (   self  ) 

override post_init in subclasses to do computations after the construction, usually based on extra keywords.  
This avoids the need for every general_optic to override the default constructor. 

Reimplemented from null_optic.

Definition at line 1439 of file general_optics.py.

01439                            :
01440                 pass
01441 
        def info_str(self):


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