Python for gds read in and layer information output problem

Comments

• dion

  May 2018 edited May 2018

  you could write a.py file like
  
  import pya
  
  layout = pya.Layout()
  layout.read('c:\Training\123.gds.gz')
  
  for ly_id in layout.layer_indices():
  ly_info = layout.get_info(ly_id)
  print(ly_info.to_s())
  
  
  
  then using klayout to load a.py like,
  klayout -zz -r a.py
  
  
  Thanks,
  Dion
• zmh021810

  May 2018 edited November -1

  Hi, Dion,
  
  Thanks a lot, I am using windows PC, not Linux.
  
  import pya
  
  layout = pya.Layout()
  layout.read('c:\Training\123.gds.gz')
  
  for ly_id in layout.layer_indices():
  ly_info = layout.get_info(ly_id)
  print(ly_info.to_s())
  
  
  When I use ur code, it shows an error:
  
  line7: expected an indented block
  
  line7 is the code "ly_info = layout.get_info(ly_id)"
  
  Well, do u know what is the problem about that?
  
  
  BTW,can u give me ur email address? so I can cut a picture and send to you, then you can have more details about my problem. I think something is wrong about my operation.
  
  Thanks!
  
  Muheng
• Matthias

  May 2018 edited November -1

  Hi Muheng,

  please use Markdown to format your code (four blanks in front of the line. Otherwise your code formatting does not become visible.

  And please make yourself familiar with Python.

  The code is:

  import pya
  
  layout = pya.Layout()
  layout.read('c:\\Training\\123.gds.gz')
  
  for ly_id in layout.layer_indices():
    ly_info = layout.get_info(ly_id)
    print(ly_info.to_s())
  

  Matthias
• ejprinz

  May 2018 edited November -1

  Hi Muheng, if you want to code in Python I would use PyCharm - it tells you prior to running the code whether there are errors (not just grammer, also runtime). You can then use KLayout in batch mode and drive it from PyCharm.
  
  Cheers, Erwin
• zmh021810

  May 2018 edited November -1

  Hi, Matthias and Ejprinz,
  
  thanks a lot, now the code works!
  
  I will keep on studying python and klayout
  
  Best wishes
  
  Muheng
• zmh021810

  May 2018 edited November -1

  Hi, Ejprinz,
  
  I am using PyCharm to program python now in windows, one thing I am not familiar is the Klayout pya module.
  
  Usually on the top of the python code, we can type the database which u want to import, for example
  
  import xlwt
  
  or
  
  import pya
  
  
  But when I open Pycharm, I think 1st I need to to let the Pycharm know that the library "pya", right? otherwise I think the code does not know the pya means.
  
  Well, do u know how to setup in Pycharm and let it know pya library?
  
  Best wishes
  
  Muheng
• Matthias

  May 2018

  Hi Muheng,

  currently you cannot import pya as there is no such module. It's a function built into KLayout, so you need to work inside KLayout to get it. I'm working on providing such an external module, but it's only going to cover the geometry database part.

  Matthias
• zmh021810

  May 2018

  oh, OK, thanks, Matthias
• ejprinz

  June 2018

  Hi Muheng, I very much look forward to Matthias's work of having a database module which can be used from a normal Python, but until then, you can still use PyCharm but you have to set the interpreter (in PyCharm) to be a windows batch file with the following content:

  @echo off
  setlocal
  C:\Program_Files\KLayout\klayout_app.exe -b -r %1
  

  The debugger in PyCharm doesn't work this way but the syntax checking etc. does.

  Best regards, Erwin