Does pyfastx split fasta files sequentially? about pyfastx HOT 7 CLOSED

I tried running split and got the following error:

python: malloc.c:2401: sysmalloc: Assertion `(old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed.

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I have fixed the memory malloc issue in new version. pyfastx can not split FASTA file sequentially. But pyfastx sequentially split FASTQ file. If you use pyfastx split paired-end fastq file. You should insure the two paired files have the same read counts and reads are paired in the same line position.

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So, pyfastx output is deterministic? That is paired-end files with reads in the paired-order and the same number of reads will have the same subsets by position in each of the N files produced by split? And these will be deterministic but not sequential subsets?

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Just re-read your comment didn't notice the difference between FASTA and FASTQ. Why make an index if you are just splitting FASTQ sequentially?

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Thank you for your suggestion. It's really not necessary to build index prior to splitting FASTQ file. This will be fixed in later version.

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You could use the functionality to allow random sampling of the FASTQ file from the command line. I would find this very useful.

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I will consider your suggestion and implement a functionality for random sampling reads from FASTQ file.

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