Re: Non-hacky method to take list of keys as parameter?

No problem at all, Anton :)

The conversions are basically: if it's a list of a basic type, it can be converted to a
C++ std::vector<that type>.
From the top of my head, we don't have a lot of methods in GNU Radio where we expose a
std::vector<std::string> parameter to Python, but we do have some where we return a C++
vector of strings and it gets converted to a Python `list` of `str`. All that should be
necessary for that is to `#include <pybind11/stl.h>` in
python/yourmodule/bindings/yourblock_python.cc

Best regards,
Marcus

On 16.07.21 00:08, Anton Ottosson wrote:
> Oh, sorry! I meant Marcus, of course, not "Amrcus".
>
>
> Best,
>
> Anton
>
> ------------------------------------------------------------------------------------------
> *From:* Anton Ottosson
> *Sent:* Friday, July 16, 2021 12:07:47 AM
> *To:* discuss-gnuradio@gnu.org
> *Subject:* Re: Non-hacky method to take list of keys as parameter?
>  
>
> Hi Amrcus,
> Your first example would be ideal, but I seem to remember trying that and having issues
> with it, probably due to the implicit type conversion from Python to C++. I will try
> again, but is there anywhere one can look up what the conversions are?
>
>
> Best regards,
>
> Anton
>
> ------------------------------------------------------------------------------------------
> *From:* Marcus Müller <mmueller@gnuradio.org>
> *Sent:* Thursday, July 15, 2021 11:54:00 PM
> *To:* discuss-gnuradio@gnu.org
> *Cc:* Anton Ottosson
> *Subject:* Re: Non-hacky method to take list of keys as parameter?
>  
> Just use `dtype: raw` in the YAML file; then anything that's valid python goes!
>
> For example `["key1", "key2"]`,
>  but also other things like dicts, `{ "key1": 42, "key2": 1337 }`.
>
> Best regards,
> Marcus
>
> On 15.07.21 06:58, Anton Ottosson wrote:
>> Hi,
>>
>> I'm writing a block for an OOT module and I would like to take a list of keys as one of
>> the parameters. They will be used to select entries in a pmt dictionary. I first tried to
>> use std::vector<std::string> as the parameter type, but there doesn't seem to exist any
>> corresponding string_vector dtype to use in the YAML file
>> (https://wiki.gnuradio.org/index.php/YAML_GRC
>> <https://wiki.gnuradio.org/index.php/YAML_GRC
> <https://wiki.gnuradio.org/index.php/YAML_GRC>>). I then switched over to pmt arguments and
>> managed to get it to work, but it is very ugly and hacky. This is the kind of thing I have
>> to enter into the parameter field on the block:
>>
>>
>> pmt.list2(pmt.intern("key1"), pmt.intern("key2"))
>>
>>
>> Is there a better way? Is there a block that does something similar that I can take a look
>> at? Best I could find was PDU Filter, but it only takes a single key, not a list.
>>
>>
>> Best regards,
>>
>> Anton
>>