"""Concatenate all sequences starting with identical transcripit ID and outputs it as a list with sequence header (Transcript ID) and concatenated sequences.
"""Concatenate all sequences starting with identical transcripit ID and outputs it as a list with sequence header (Transcript ID) and concatenated sequences as tuples.
Args:
Args:
post_bedtools_fasta: The name of the fasta file obtained after bedtools has been run
post_bedtools_fasta: The name of the fasta file obtained after bedtools has been run
Returns:
Returns:
A list with transcript ID in even indices and corresponding concatenated exons in odd indices.
A list containing transcript ID and concatenated exons in tuples.