Returns a 64 bit regionkey based on CHROM, START POS (0-based), END POS and STRAND.

Returns a 64 bit regionkey based on CHROM, START POS (0-based), END POS and STRAND.

RegionKey(chrom, startpos, endpos, strand)

Arguments

chrom	Chromosome. An identifier from the reference genome, no white-space or leading zeros permitted.
startpos	Start position (zero based).
endpos	End position (startpos + region_length).
strand	Strand direction (-1, 0, +1)
sizechrom	Length of the chrom string, excluding the terminating null byte.