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function usage()
io.stderr:write(string.format("Usage: %s <GFF annotation>\n" , arg[0]))
os.exit(1)
end
if #arg < 1 then
usage()
os.exit(1)
end
f_stream = gt.custom_stream_new_unsorted()
f_stream.instream = gt.gff3_in_stream_new_sorted(arg[1])
function f_stream:next_tree()
local node = self.instream:next_tree()
if node then
node:get_range()
node:get_seqid()
node:get_filename()
node:get_line_number()
end
return node
end
local gn = f_stream:next_tree()
while (gn) do
gn = f_stream:next_tree()
end
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