Demultiplexing.py is a script to demultiplex fastq.gz files where file 1 is read 1 (insert sequence) and file 2 is read 2 (index sequence) and file 3 is read 3 (index sequence) and file 4 is read 4 (insert sequence). Demultiplexing.py also requires a index key .tsv file.
Demultiplex.py is a script is a quality assessment tool such as fastQC but only returns a list of average quality read scores by position.