Thanks! Do you by any chance have links to specific code examples that could help out? I've been trying to look at old examples you have posted to others on this forum, however, some of the links from github seem to be broken.
On Fri, Jul 13, 2012 at 12:52 PM, Josh Blum <[email protected]> wrote: > > > On 07/13/2012 08:51 AM, Anisha Gorur wrote: > > Hello all, > > I've been trying to work with stream tags in python, mainly using the > > grextras blocks coding guide > > here:https://github.com/guruofquality/grextras/wiki/Blo... > > < > https://github.com/guruofquality/grextras/wiki/Blocks-Coding-Guide#wiki-the-work-function > >. > > > > I've set up a very simple flow graph, just a vector source, throttle and > > file sink, and I would like to place a tag on the first element of the > > vector that contains time metadata. I'm using this code: > > > > def work(self, input_items, output_items): > > item_index = ? #which output item gets the tag? > > set item_index to x so the tag gets associated with outputs_items[0][x] > > > offset = self.nitems_written(0) + item_index > > key = pmt.pmt_string_to_symbol("example_key") > > value = pmt.pmt_string_to_symbol("example_value") > > > > #write at tag to output port 0 with given absolute item offset > > self.add_item_tag(0, offset, key, value) > > > > I think the problem has something to do with not implementing the > > correct modules. My question is, what are the appropriate modules to > > import to read and write stream tags in python? > > > > You might want to look more that that coding guide, at lot of the > snippets are just work functions, but many contain full class > definitions with import statements. For example: > > from gnuradio import gr > import gnuradio.extras > > class my_sync_block(gr.block): > > def __init__(self, args): > gr.block.__init__(self, name="my block", in_sig=[numpy.int32], > out_sig=[numpy.int32]) > > def work(self, input_items, output_items): > #work stuff... > return len(output_items[0]) > > -josh > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Anisha Gorur Class of 2012 Electrical Engineering
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