Re: File Meta Sink question

[Volker Schroer]

Have a look at

https://wiki.gnuradio.org/index.php/File_Meta_Sink

There you'll find an example with multiple entries.
> I was able to get a little farther with using import pmt in the Import
> block.   I am now having some new difficulty with the Extra Dict field
> in the File Meta Sink block.    I'd like to add a few definitions to the
> Extra Dictionary.
>
> If I use:
> pmt.dict_add(pmt.make_dict(),pmt.intern('FFT_size'),pmt.from_long(FFT_size))
> to add in the FFT_size, that will run without error.   However, I'm not
> sure how to add another entry.
>
> If I try adding another entry,
> pmt.dict_add(pmt.make_dict(),pmt.intern('FFT_size'),pmt.from_long(FFT_size)), 
> pmt.dict_add(pmt.make_dict(),pmt.intern('freq'),pmt.from_long(freq))
>
> I get an error about incompatible constructor arguments:
> in __init__
>      self.blocks_file_meta_sink_0 =
> blocks.file_meta_sink(gr.sizeof_float*FFT_size, 'output.dat', samp_rate,
> 1, blocks.GR_FILE_FLOAT, False, 1000000,
> pmt.dict_add(pmt.make_dict(),pmt.intern('FFT_size'),pmt.from_long(FFT_size)),pmt.dict_add(pmt.make_dict(),pmt.intern('freq'),pmt.from_long(freq)),
>  False)
> TypeError: __init__(): incompatible constructor arguments. The following
> argument types are supported:
>      1. gnuradio.blocks.blocks_python.file_meta_sink(itemsize: int,
> filename: str, samp_rate: float = 1, relative_rate: float = 1, type:
> gnuradio.blocks.blocks_python.gr_file_types =
> <gr_file_types.GR_FILE_FLOAT: 5>, complex: bool = True,
> max_segment_size: int = 1000000, extra_dict: pmt.pmt_python.pmt_base =
> (), detached_header: bool = False)
>
> Invoked with: 4096, 'output.dat', 10000000, 1,
> <gr_file_types.GR_FILE_FLOAT: 5>, False, 1000000, ((FFT_size . 1024)),
> ((freq . 105700000)), False
>
>
> If I try the entry this way:
> pmt.dict_add(pmt.make_dict(),pmt.intern('FFT_size','freq'),pmt.from_long(FFT_size,freq))
>
> I get an error in the block:
>   Param - Extra Dict.(extra_dict):
> Value
> "pmt.dict_add(pmt.make_dict(),pmt.intern('FFT_size','freq'),pmt.from_long(FFT_size,freq))"
>  cannot be evaluated:
> intern(): incompatible function arguments. The following argument types
> are supported:
>     1. (s: str) -> pmt.pmt_python.pmt_base
>
> I'm not sure how to add multiple entries to the dictionary, or if it's
> possible to do so.    Thanks for any assistance!
> Invoked with: 'FFT_size', 'freq'