Underscore in variable names inside k4.

[Krishna]

Dear q (and k4) folks, 

I was writing some code in k4(oh, the joy!) and was having trouble using variables with "_" in them. I can avoid this in my code, but when I use the embedPy module, some names imposed by python(e.g: fit_transform) signal errors. 

How may I work with this? Is there a way to escape the "_" so k4 accepts it? Please advise.

Thank you, 

Kumar

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[Alexander_Belop]

On Monday, January 22, 2018 at 7:25:42 AM UTC-5, Krishna wrote:

Is there a way to escape the "_" so k4 accepts it? 

If you create a variable with an _ in the name in q, you should be able to retrieve it from k4 as follows:

q)foo_bar:42

q)\

  `. `$"foo_bar"

42 

You can also reset it with

  @[`.;`$"foo_bar";:;43]

  \

q)foo_bar

43

This is not pretty and if you have to work with such names, it is probably better to do it in q.

[Krishna]

Thanks very much, Alexander. For purposes of embedPy calling from inside k4(although superfluous, when there is convenient calling from inside q), I managed to conjure the following :

`$"fit_transform" - this returns a `fit_transform, which is what the python call inside embedPy requires. This does the job. 

As for using "_" inside variable names inside k4, i shall avoid it like the plague. 

Quick question - what does the `. do, inside k4? 

Cheers, 

Kumar

[effbiae]

q)value`.    /is a dictionary

foo_bar| 42

[Alexander_Belop]

On Tuesday, January 23, 2018 at 4:28:41 AM UTC-5, Krishna wrote:

Quick question - what does the `. do, inside k4? 

`. is the name of the root namespace, but on the second thought, simply using the . function (eval) is probably better:

  q)foo_bar:42

  .`$"foo_bar"

42 

[Krishna]

Thanks, Alexander. 

Kumar