Moving set of layers

Comments

• Matthias

  October 2019

  Hi,

  the solution depends on what you want to achieve.

  In any case I'd recommend to use the LayerIterator concept. "LayoutView#each_layer" isn't entirely stable for iterating while deleting (see https://github.com/KLayout/klayout/issues/368).

  Here is some sample code that moves all layer with even GDS layer numbers to the end:

  # Example: shuffle the layers so that even-numbered layers
  # move to the end.
  
  lv = pya.LayoutView.current()
  
  to_insert = []
  
  # Delete all layers with even layer numbers and keep their properties
  li = lv.begin_layers()
  while not li.at_end():
    if li.current().source_layer % 2 == 0:
      # keep the layer properties (dup LayerPropertiesNode) and 
      # delete the layer. li.next() isn't required as li will point
      # to the next entry anyway.
      to_insert.append(li.current().dup())
      lv.delete_layer(li)
    else:
      li.next()
  
  # Finally insert the deleted layers at the end of the layer list
  for l in to_insert:
    lv.insert_layer(lv.end_layers(), l)
  

  Kind regards,

  Matthias
• EugeneZelenko

  October 2019

  Hi, Matthias!

  Thank you for help! Similar code pattern (I used active_cellview.index() as criteria) solved my problem!