Clarification Flanking

[tdsone]

Hey there!

I've been unsure about the use of the flanking parameter in the fetch method of the Fasta class. I would have expected that flank_left and flank_right from the datasets (e.g. for the gene_finding task [1]) are used in the fetch method with the flank parameter. But two things confuse me: 1) it's never done, nor can I find any other use of flank_left and flank_right in the code and 2) the flank parameter is applied symmetrically while flank left and right are unequal values.

Thanks for your help :)

[1] Gene Finding Data with flank_left and flank_right

head gene_finding.bed
chromosome	start	end	transcript_id	strand	flank_left	flank_right	length	split
chr7	142924180	142934109	ENST00000442623.1	-	614	386	9929	train
chr7	142939447	142941832	ENST00000409607.5	+	36	964	2385	train