[python #UJM-414395]: problem converting gempak table

Hi, thanks for reaching out!

I was able to use the code in your second link to appropriately write out your 
attached gempak color table to a new file, which can then be read back in using 
our `read_colortable` helper or just by hand, for example:

  from metpy.plots.ctables import convert_gempak_table, read_colortable
  from matplotlib.colors import ListedColormap
  
  with open("ir_upc2.tbl", "r") as infile, open("ir_upc2_converted.tbl", "w") 
as outfile:
      # read our old table and write to a new one
      convert_gempak_table(infile, outfile)
  
  with open("ir_upc2_converted.tbl", "r") as infile:
      # read in our new table!
      ctable = read_colortable(infile)
  
  cmap = ListedColormap(ctable)
  print(cmap.colors)  # just to see


What specific errors or problems are you encountering? There are some other 
code snippets here 
(https://github.com/Unidata/MetPy/issues/3243#issuecomment-1779829053) that can 
help you without saving a new file, if that's what you're looking for.

Please follow up with any tracebacks or additional errors you're receiving, and 
let me know if I can provide any more resources here! I hope this helps.


All the best,

Drew


> I have some gempak color tables (one example attached).
> I am trying to use convert_gempak_table from metpy.
> I checked the doc (
> https://unidata.github.io/MetPy/latest/api/generated/metpy.plots.ctables.convert_gempak_table.html
> )
> and the posts (
> https://www.unidata.ucar.edu/support/help/MailArchives/python/msg00223.html)
> I have no idea how to define correctly the out_file that I would get a
> usable color table. I am sincerely lost!!! Thanks in advance for any help
> here is part of the code I wrote but seems useless
> >from metpy.plots.ctables import convert_gempak_table
> >import io
> >ir_upc2_tbl = open("ir_upc2.tbl","r")
> >our_outfile = io.StringIO()
> >convert_gempak_table(ir_upc2_tbl,our_outfile)
> >#help(convert_gempak_table)


Ticket Details
===================
Ticket ID: UJM-414395
Department: Support Python
Priority: Low
Status: Closed
===================
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