• kdb+

  EmbedPy question, function in python that returns more than one value.

  Posted by krish240574 on August 11, 2021 at 12:00 am

  Python code :  fig, axes = plt.subplots(ncols=2, figsize=(24, 8), dpi=100)

  q code :

  plt:.p.import[`matplotlib;`:pyplot]
  plt[`:subplots;<;pykwargs `ncols`figsize`dpi!(2;24 8;100)] returns (foreign;foreign) – corresponding to (fig, axes) in python. How do I access each value of the returned list of (foreign;foreign), inside q?

  Thanks,

  Kumar

  krish240574 replied 8 months ago 4 Members · 3 Replies
• 3 Replies

• 

  sstantoncook

  Member

  August 13, 2021 at 12:00 am

  Hi Kumar,

  To index into a python objext you can use the syntax of a backtick character “`” to convert to q. E.g.
  variable`

  If you have a list of variable you want to index into you could alternatively write

  {x ` } each list_of_python_variables

  or
  list_of_python_variables@:`

  Depending on which syntax you prefer.

  Cheers,

  Sam

• 

  rocuinneagain

  Member

  August 13, 2021 at 12:00 am

  You can use .p.wrap https://code.kx.com/q/ml/embedpy/userguide/#embedpy-objects_1

   

  Small example giving each subplot a title:

  plt:.p.import[`matplotlib;`:pyplot]
  plts:plt[`:subplots;<;pykwargs `ncols`figsize`dpi!(2;24 8;100)]
  .p.wrap[plts[1;0]][`:set_title]"Plot1";
  .p.wrap[plts[1;1]][`:set_title]"Plot2";
  plt[`:show][];

  Results in:

   

   

• 

  CareyT

  Administrator

  March 4, 2024 at 10:06 am

  hello
  

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